13889725 has 6 divisors (see below), whose sum is σ = 17223290. Its totient is φ = 11111760.

The previous prime is 13889717. The next prime is 13889737. The reversal of 13889725 is 52798831.

It can be written as a sum of positive squares in 3 ways, for example, as 1315609 + 12574116 = 1147^2 + 3546^2 .

It is not a de Polignac number, because 13889725 - 2³ = 13889717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277770 + ... + 277819.

Almost surely, 2^13889725 is an apocalyptic number.

It is an amenable number.

13889725 is a deficient number, since it is larger than the sum of its proper divisors (3333565).

13889725 is an equidigital number, since it uses as much as digits as its factorization.

13889725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555599 (or 555594 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 13889725 is about 3726.8921368883. The cubic root of 13889725 is about 240.3797518113.

The spelling of 13889725 in words is "thirteen million, eight hundred eighty-nine thousand, seven hundred twenty-five".