129945868 has 24 divisors (see below), whose sum is σ = 253345680. Its totient is φ = 57906240.

The previous prime is 129945859. The next prime is 129945901. The reversal of 129945868 is 868549921.

It is a super-2 number, since 2×129945868² = 33771857220546848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41578 + ... + 44593.

It is an arithmetic number, because the mean of its divisors is an integer number (10556070).

Almost surely, 2^129945868 is an apocalyptic number.

It is an amenable number.

129945868 is a deficient number, since it is larger than the sum of its proper divisors (123399812).

129945868 is a wasteful number, since it uses less digits than its factorization.

129945868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86217 (or 86215 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 52.

The square root of 129945868 is about 11399.3801585876. The cubic root of 129945868 is about 506.5093788857.

The spelling of 129945868 in words is "one hundred twenty-nine million, nine hundred forty-five thousand, eight hundred sixty-eight".