129833972 has 24 divisors (see below), whose sum is σ = 232377600. Its totient is φ = 63457056.

The previous prime is 129833971. The next prime is 129833987. The reversal of 129833972 is 279338921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129833971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30554 + ... + 34542.

It is an arithmetic number, because the mean of its divisors is an integer number (9682400).

Almost surely, 2^129833972 is an apocalyptic number.

It is an amenable number.

129833972 is a deficient number, since it is larger than the sum of its proper divisors (102543628).

129833972 is a wasteful number, since it uses less digits than its factorization.

129833972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175 (or 4173 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The square root of 129833972 is about 11394.4711154138. The cubic root of 129833972 is about 506.3639525630.

The spelling of 129833972 in words is "one hundred twenty-nine million, eight hundred thirty-three thousand, nine hundred seventy-two".