129031377 has 16 divisors (see below), whose sum is σ = 182492352. Its totient is φ = 80814080.

The previous prime is 129031373. The next prime is 129031429. The reversal of 129031377 is 773130921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 129031377 - 2² = 129031373 is a prime.

It is a super-2 number, since 2×129031377² = 33298192501032258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129031373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30718 + ... + 34664.

It is an arithmetic number, because the mean of its divisors is an integer number (11405772).

Almost surely, 2^129031377 is an apocalyptic number.

129031377 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

129031377 is a deficient number, since it is larger than the sum of its proper divisors (53460975).

129031377 is a wasteful number, since it uses less digits than its factorization.

129031377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4608.

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 129031377 is about 11359.1979030211. The cubic root of 129031377 is about 505.3183980408.

The spelling of 129031377 in words is "one hundred twenty-nine million, thirty-one thousand, three hundred seventy-seven".