129938970 has 64 divisors (see below), whose sum is σ = 357477120. Its totient is φ = 29611008.

The previous prime is 129938959. The next prime is 129938989. The reversal of 129938970 is 79839921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90216 + ... + 91644.

It is an arithmetic number, because the mean of its divisors is an integer number (5585580).

Almost surely, 2^129938970 is an apocalyptic number.

129938970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129938970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178738560).

129938970 is an abundant number, since it is smaller than the sum of its proper divisors (227538150).

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

129938970 is a wasteful number, since it uses less digits than its factorization.

129938970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 129938970 is about 11399.0775942617. The cubic root of 129938970 is about 506.5004162729.

The spelling of 129938970 in words is "one hundred twenty-nine million, nine hundred thirty-eight thousand, nine hundred seventy".