129649672 has 16 divisors (see below), whose sum is σ = 243302400. Its totient is φ = 64769040.

The previous prime is 129649669. The next prime is 129649693. The reversal of 129649672 is 276946921.

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, 3897 + ... + 16567.

It is an arithmetic number, because the mean of its divisors is an integer number (15206400).

Almost surely, 2^129649672 is an apocalyptic number.

It is an amenable number.

129649672 is a deficient number, since it is larger than the sum of its proper divisors (113652728).

129649672 is a wasteful number, since it uses less digits than its factorization.

129649672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13956 (or 13952 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 129649672 is about 11386.3809878293. The cubic root of 129649672 is about 506.1242436812.

It can be divided in two parts, 129649 and 672, that added together give a 4-th power (130321 = 19⁴).

The spelling of 129649672 in words is "one hundred twenty-nine million, six hundred forty-nine thousand, six hundred seventy-two".