13625609 has 8 divisors (see below), whose sum is σ = 13813248. Its totient is φ = 13439520.

The previous prime is 13625593. The next prime is 13625617. The reversal of 13625609 is 90652631.

13625609 = 72² + 73² + ... + 345².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13625609 - 2⁴ = 13625593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13625639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36944 + ... + 37310.

It is an arithmetic number, because the mean of its divisors is an integer number (1726656).

Almost surely, 2^13625609 is an apocalyptic number.

It is an amenable number.

13625609 is a deficient number, since it is larger than the sum of its proper divisors (187639).

13625609 is a wasteful number, since it uses less digits than its factorization.

13625609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775.

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

The square root of 13625609 is about 3691.2882575058. The cubic root of 13625609 is about 238.8463675375.

The spelling of 13625609 in words is "thirteen million, six hundred twenty-five thousand, six hundred nine".