13609625 has 8 divisors (see below), whose sum is σ = 16984968. Its totient is φ = 10887600.

The previous prime is 13609621. The next prime is 13609627. The reversal of 13609625 is 52690631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8281 + 13601344 = 91^2 + 3688^2 .

It is not a de Polignac number, because 13609625 - 2² = 13609621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13609591 and 13609600.

It is not an unprimeable number, because it can be changed into a prime (13609621) 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, 54314 + ... + 54563.

It is an arithmetic number, because the mean of its divisors is an integer number (2123121).

Almost surely, 2^13609625 is an apocalyptic number.

It is an amenable number.

13609625 is a deficient number, since it is larger than the sum of its proper divisors (3375343).

13609625 is an equidigital number, since it uses as much as digits as its factorization.

13609625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108892 (or 108882 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 13609625 is about 3689.1225243952. The cubic root of 13609625 is about 238.7529352818.

The spelling of 13609625 in words is "thirteen million, six hundred nine thousand, six hundred twenty-five".