129900972 has 12 divisors (see below), whose sum is σ = 303102296. Its totient is φ = 43300320.

The previous prime is 129900971. The next prime is 129900973. The reversal of 129900972 is 279009921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129900971) and next prime (129900973).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 129900972.

It is not an unprimeable number, because it can be changed into a prime (129900971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5412529 + ... + 5412552.

Almost surely, 2^129900972 is an apocalyptic number.

129900972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129900972 is an abundant number, since it is smaller than the sum of its proper divisors (173201324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129900972 is a wasteful number, since it uses less digits than its factorization.

129900972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10825088 (or 10825086 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 129900972 is about 11397.4107585890. The cubic root of 129900972 is about 506.4510395561.

The spelling of 129900972 in words is "one hundred twenty-nine million, nine hundred thousand, nine hundred seventy-two".