129838970 has 32 divisors (see below), whose sum is σ = 247060800. Its totient is φ = 48992256.

The previous prime is 129838967. The next prime is 129838981. The reversal of 129838970 is 79838921.

It is an unprimeable number.

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, 47501 + ... + 50159.

It is an arithmetic number, because the mean of its divisors is an integer number (7720650).

Almost surely, 2^129838970 is an apocalyptic number.

129838970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129838970 is a deficient number, since it is larger than the sum of its proper divisors (117221830).

129838970 is a wasteful number, since it uses less digits than its factorization.

129838970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 129838970 is about 11394.6904301960. The cubic root of 129838970 is about 506.3704500267.

The spelling of 129838970 in words is "one hundred twenty-nine million, eight hundred thirty-eight thousand, nine hundred seventy".