| Base | Representation |
|---|---|
| bin | 1011111010111… |
| … | …10000010011100 |
| 3 | 20222011112002000 |
| 4 | 11331132002130 |
| 5 | 201044444100 |
| 6 | 13531202300 |
| 7 | 2322661620 |
| oct | 575360234 |
| 9 | 228145060 |
| 10 | 99999900 |
| 11 | 514a1450 |
| 12 | 295a6390 |
| 13 | 17943750 |
| 14 | d3d1180 |
| 15 | 8ba4900 |
| hex | 5f5e09c |
99999900 has 576 divisors, whose sum is σ = 443304960. Its totient is φ = 18662400.
The previous prime is 99999847. The next prime is 99999931. The reversal of 99999900 is 999999.
99999900 = T197 + T198 + ... + T846.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is a zygodrome in base 10.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2702682 + ... + 2702718.
Almost surely, 299999900 is an apocalyptic number.
99999900 is a gapful number since it is divisible by the number (90) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 99999900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221652480).
99999900 is an abundant number, since it is smaller than the sum of its proper divisors (343305060).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
99999900 is a wasteful number, since it uses less digits than its factorization.
99999900 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 91 (or 78 counting only the distinct ones).
The product of its (nonzero) digits is 531441, while the sum is 54.
The square root of 99999900 is about 9999.9949999987. The cubic root of 99999900 is about 464.1587286416.
99999900 divided by its sum of digits (54) gives a triangular number (1851850 = T1924).
Multiplying 99999900 by its reverse (999999), we get a square (99999800000100 = 99999902).
99999900 divided by its reverse (999999) gives a square (100 = 102).
It can be divided in two parts, 999 and 99900, that multiplied together give a square (99800100 = 99902).
The spelling of 99999900 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred".
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