13639172 has 12 divisors (see below), whose sum is σ = 24043740. Its totient is φ = 6769536.

The previous prime is 13639139. The next prime is 13639181. The reversal of 13639172 is 27193631.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2775556 + 10863616 = 1666^2 + 3296^2 .

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, 11897 + ... + 12992.

It is an arithmetic number, because the mean of its divisors is an integer number (2003645).

Almost surely, 2^13639172 is an apocalyptic number.

It is an amenable number.

13639172 is a deficient number, since it is larger than the sum of its proper divisors (10404568).

13639172 is a wasteful number, since it uses less digits than its factorization.

13639172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25030 (or 25028 counting only the distinct ones).

The product of its digits is 6804, while the sum is 32.

The square root of 13639172 is about 3693.1249640379. The cubic root of 13639172 is about 238.9255908836.

The spelling of 13639172 in words is "thirteen million, six hundred thirty-nine thousand, one hundred seventy-two".