13999625 has 8 divisors (see below), whose sum is σ = 17471688. Its totient is φ = 11199600.

The previous prime is 13999621. The next prime is 13999651. The reversal of 13999625 is 52699931.

13999625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 190969 + 13808656 = 437^2 + 3716^2 .

It is not a de Polignac number, because 13999625 - 2² = 13999621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13999621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55874 + ... + 56123.

It is an arithmetic number, because the mean of its divisors is an integer number (2183961).

Almost surely, 2^13999625 is an apocalyptic number.

It is an amenable number.

13999625 is a deficient number, since it is larger than the sum of its proper divisors (3472063).

13999625 is an equidigital number, since it uses as much as digits as its factorization.

13999625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112012 (or 112002 counting only the distinct ones).

The product of its digits is 131220, while the sum is 44.

The square root of 13999625 is about 3741.6072749555. The cubic root of 13999625 is about 241.0120744856.

The spelling of 13999625 in words is "thirteen million, nine hundred ninety-nine thousand, six hundred twenty-five".