129319612 has 12 divisors (see below), whose sum is σ = 239621760. Its totient is φ = 60856256.

The previous prime is 129319609. The next prime is 129319621. The reversal of 129319612 is 216913921.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950812 + ... + 950947.

It is an arithmetic number, because the mean of its divisors is an integer number (19968480).

Almost surely, 2^129319612 is an apocalyptic number.

It is an amenable number.

129319612 is a deficient number, since it is larger than the sum of its proper divisors (110302148).

129319612 is a wasteful number, since it uses less digits than its factorization.

129319612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901780 (or 1901778 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 129319612 is about 11371.8781210493. The cubic root of 129319612 is about 505.6943844434.

The spelling of 129319612 in words is "one hundred twenty-nine million, three hundred nineteen thousand, six hundred twelve".