129696884 has 6 divisors (see below), whose sum is σ = 226969554. Its totient is φ = 64848440.

The previous prime is 129696881. The next prime is 129696911. The reversal of 129696884 is 488696921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 125933284 + 3763600 = 11222^2 + 1940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129696881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16212107 + ... + 16212114.

It is an arithmetic number, because the mean of its divisors is an integer number (37828259).

Almost surely, 2^129696884 is an apocalyptic number.

It is an amenable number.

129696884 is a deficient number, since it is larger than the sum of its proper divisors (97272670).

129696884 is a wasteful number, since it uses less digits than its factorization.

129696884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32424225 (or 32424223 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 53.

The square root of 129696884 is about 11388.4539776038. The cubic root of 129696884 is about 506.1856713669.

The spelling of 129696884 in words is "one hundred twenty-nine million, six hundred ninety-six thousand, eight hundred eighty-four".