129913232 has 10 divisors (see below), whose sum is σ = 251706918. Its totient is φ = 64956608.

The previous prime is 129913213. The next prime is 129913247. The reversal of 129913232 is 232319921.

It can be written as a sum of positive squares in only one way, i.e., 124456336 + 5456896 = 11156^2 + 2336^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4059773 + ... + 4059804.

Almost surely, 2^129913232 is an apocalyptic number.

It is an amenable number.

129913232 is a deficient number, since it is larger than the sum of its proper divisors (121793686).

129913232 is an equidigital number, since it uses as much as digits as its factorization.

129913232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119585 (or 8119579 counting only the distinct ones).

The product of its digits is 5832, while the sum is 32.

The square root of 129913232 is about 11397.9485873555. The cubic root of 129913232 is about 506.4669719348.

The spelling of 129913232 in words is "one hundred twenty-nine million, nine hundred thirteen thousand, two hundred thirty-two".