129992764 has 24 divisors (see below), whose sum is σ = 251669376. Its totient is φ = 58254000.

The previous prime is 129992743. The next prime is 129992767. The reversal of 129992764 is 467299921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129992767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17682 + ... + 23929.

It is an arithmetic number, because the mean of its divisors is an integer number (10486224).

Almost surely, 2^129992764 is an apocalyptic number.

It is an amenable number.

129992764 is a deficient number, since it is larger than the sum of its proper divisors (121676612).

129992764 is a wasteful number, since it uses less digits than its factorization.

129992764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41697 (or 41695 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The square root of 129992764 is about 11401.4369269842. The cubic root of 129992764 is about 506.5703027338.

The spelling of 129992764 in words is "one hundred twenty-nine million, nine hundred ninety-two thousand, seven hundred sixty-four".