| Base | Representation |
|---|---|
| bin | 1111011100110… |
| … | …00000111101010 |
| 3 | 100000212020221100 |
| 4 | 13232120013222 |
| 5 | 231134113210 |
| 6 | 20505422230 |
| 7 | 3132364350 |
| oct | 756300752 |
| 9 | 300766840 |
| 10 | 129597930 |
| 11 | 67177930 |
| 12 | 3749a976 |
| 13 | 20b07787 |
| 14 | 132d77d0 |
| 15 | b59e5c0 |
| hex | 7b981ea |
129597930 has 96 divisors (see below), whose sum is σ = 420121728. Its totient is φ = 26928000.
The previous prime is 129597929. The next prime is 129597931. The reversal of 129597930 is 39795921.
It is a happy number.
129597930 is a `hidden beast` number, since 1 + 29 + 597 + 9 + 30 = 666.
It is an interprime number because it is at equal distance from previous prime (129597929) and next prime (129597931).
It is a Harshad number since it is a multiple of its sum of digits (45).
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (129597931) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2421 + ... + 16280.
It is an arithmetic number, because the mean of its divisors is an integer number (4376268).
Almost surely, 2129597930 is an apocalyptic number.
129597930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 129597930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210060864).
129597930 is an abundant number, since it is smaller than the sum of its proper divisors (290523798).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
129597930 is a wasteful number, since it uses less digits than its factorization.
129597930 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 18732 (or 18729 counting only the distinct ones).
The product of its (nonzero) digits is 153090, while the sum is 45.
The square root of 129597930 is about 11384.1086607604. The cubic root of 129597930 is about 506.0569048679.
It can be divided in two parts, 1295 and 97930, that added together give a square (99225 = 3152).
The spelling of 129597930 in words is "one hundred twenty-nine million, five hundred ninety-seven thousand, nine hundred thirty".
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