129601996 has 12 divisors (see below), whose sum is σ = 230648040. Its totient is φ = 63702560.

The previous prime is 129601993. The next prime is 129602027. The reversal of 129601996 is 699106921.

It is not an unprimeable number, because it can be changed into a prime (129601993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274345 + ... + 274816.

It is an arithmetic number, because the mean of its divisors is an integer number (19220670).

Almost surely, 2^129601996 is an apocalyptic number.

It is an amenable number.

129601996 is a deficient number, since it is larger than the sum of its proper divisors (101046044).

129601996 is a wasteful number, since it uses less digits than its factorization.

129601996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549224 (or 549222 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 129601996 is about 11384.2872416327. The cubic root of 129601996 is about 506.0621971486.

The spelling of 129601996 in words is "one hundred twenty-nine million, six hundred one thousand, nine hundred ninety-six".