129879057 has 48 divisors (see below), whose sum is σ = 226934784. Its totient is φ = 65268000.

The previous prime is 129879047. The next prime is 129879067. The reversal of 129879057 is 750978921.

It is an interprime number because it is at equal distance from previous prime (129879047) and next prime (129879067).

It is not a de Polignac number, because 129879057 - 2¹¹ = 129877009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129878997 and 129879015.

It is not an unprimeable number, because it can be changed into a prime (129879047) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48832 + ... + 51422.

It is an arithmetic number, because the mean of its divisors is an integer number (4727808).

Almost surely, 2^129879057 is an apocalyptic number.

It is an amenable number.

129879057 is a deficient number, since it is larger than the sum of its proper divisors (97055727).

129879057 is a wasteful number, since it uses less digits than its factorization.

129879057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650 (or 2643 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 48.

The square root of 129879057 is about 11396.4493154666. The cubic root of 129879057 is about 506.4225576067.

The spelling of 129879057 in words is "one hundred twenty-nine million, eight hundred seventy-nine thousand, fifty-seven".