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9999009999 = 321110129901
BaseRepresentation
bin10010100111111110…
…01100100011001111
3221210211220100002200
421103333030203033
5130434221304444
64332105252543
7502533116436
oct112377144317
927724810080
109999009999
1142711a9230
121b30794153
13c34731984
146abd8611d
153d7c64969
hex253fcc8cf

9999009999 has 36 divisors (see below), whose sum is σ = 15915167736. Its totient is φ = 5999400000.

The previous prime is 9999009997. The next prime is 9999010057.

9999009999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9999009999 - 21 = 9999009997 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999009991) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1004949 + ... + 1014849.

Almost surely, 29999009999 is an apocalyptic number.

9999009999 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

9999009999 is a deficient number, since it is larger than the sum of its proper divisors (5916157737).

9999009999 is a wasteful number, since it uses less digits than its factorization.

9999009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10120 (or 10016 counting only the distinct ones).

The product of its (nonzero) digits is 43046721, while the sum is 72.

The square root of 9999009999 is about 99995.0498724812. The cubic root of 9999009999 is about 2154.3635912690.

It can be divided in two parts, 999900 and 9999, that multiplied together give a square (9998000100 = 999902).

The spelling of 9999009999 in words is "nine billion, nine hundred ninety-nine million, nine thousand, nine hundred ninety-nine".

Divisors: 1 3 9 11 33 99 101 303 909 1111 3333 9901 9999 10201 29703 30603 89109 91809 108911 112211 326733 336633 980199 1000001 1009899 3000003 9000009 11000011 33000033 99000099 101000101 303000303 909000909 1111001111 3333003333 9999009999