129877371 has 16 divisors (see below), whose sum is σ = 207212320. Its totient is φ = 79924320.

The previous prime is 129877367. The next prime is 129877387. The reversal of 129877371 is 173778921.

It is not a de Polignac number, because 129877371 - 2² = 129877367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129877351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184660 + ... + 185361.

It is an arithmetic number, because the mean of its divisors is an integer number (12950770).

Almost surely, 2^129877371 is an apocalyptic number.

129877371 is a deficient number, since it is larger than the sum of its proper divisors (77334949).

129877371 is a wasteful number, since it uses less digits than its factorization.

129877371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370043 (or 370037 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 129877371 is about 11396.3753448191. The cubic root of 129877371 is about 506.4203662549.

The spelling of 129877371 in words is "one hundred twenty-nine million, eight hundred seventy-seven thousand, three hundred seventy-one".