129713872 has 10 divisors (see below), whose sum is σ = 251320658. Its totient is φ = 64856928.

The previous prime is 129713861. The next prime is 129713953. The reversal of 129713872 is 278317921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 117852736 + 11861136 = 10856^2 + 3444^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4053543 + ... + 4053574.

Almost surely, 2^129713872 is an apocalyptic number.

It is an amenable number.

129713872 is a deficient number, since it is larger than the sum of its proper divisors (121606786).

129713872 is an equidigital number, since it uses as much as digits as its factorization.

129713872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8107125 (or 8107119 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 129713872 is about 11389.1997962982. The cubic root of 129713872 is about 506.2077708615.

The spelling of 129713872 in words is "one hundred twenty-nine million, seven hundred thirteen thousand, eight hundred seventy-two".