13989625 has 16 divisors (see below), whose sum is σ = 18804240. Its totient is φ = 10329600.

The previous prime is 13989617. The next prime is 13989637. The reversal of 13989625 is 52698931.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9114361 + 4875264 = 3019^2 + 2208^2 .

It is not a de Polignac number, because 13989625 - 2³ = 13989617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2680 + ... + 5929.

It is an arithmetic number, because the mean of its divisors is an integer number (1175265).

Almost surely, 2^13989625 is an apocalyptic number.

It is an amenable number.

13989625 is a deficient number, since it is larger than the sum of its proper divisors (4814615).

13989625 is an equidigital number, since it uses as much as digits as its factorization.

13989625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8637 (or 8627 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 13989625 is about 3740.2707121277. The cubic root of 13989625 is about 240.9546754522.

The spelling of 13989625 in words is "thirteen million, nine hundred eighty-nine thousand, six hundred twenty-five".