129663772 has 12 divisors (see below), whose sum is σ = 259327600. Its totient is φ = 55570176.

The previous prime is 129663767. The next prime is 129663803. The reversal of 129663772 is 277366921.

129663772 is an admirable number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 2315397 + ... + 2315452.

Almost surely, 2^129663772 is an apocalyptic number.

It is an amenable number.

129663772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129663772 is a wasteful number, since it uses less digits than its factorization.

129663772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630860 (or 4630858 counting only the distinct ones).

The product of its digits is 190512, while the sum is 43.

The square root of 129663772 is about 11387.0001317292. Note that the first 3 decimals coincide. The cubic root of 129663772 is about 506.1425907983.

The spelling of 129663772 in words is "one hundred twenty-nine million, six hundred sixty-three thousand, seven hundred seventy-two".