129949732 has 24 divisors (see below), whose sum is σ = 248375232. Its totient is φ = 58999200.

The previous prime is 129949727. The next prime is 129949733. The reversal of 129949732 is 237949921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (129949733) 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, 70057 + ... + 71887.

It is an arithmetic number, because the mean of its divisors is an integer number (10348968).

Almost surely, 2^129949732 is an apocalyptic number.

It is an amenable number.

129949732 is a deficient number, since it is larger than the sum of its proper divisors (118425500).

129949732 is a wasteful number, since it uses less digits than its factorization.

129949732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459 (or 3457 counting only the distinct ones).

The product of its digits is 244944, while the sum is 46.

The square root of 129949732 is about 11399.5496402270. The cubic root of 129949732 is about 506.5143992655.

The spelling of 129949732 in words is "one hundred twenty-nine million, nine hundred forty-nine thousand, seven hundred thirty-two".