13655617 has 4 divisors (see below), whose sum is σ = 13685956. Its totient is φ = 13625280.

The previous prime is 13655611. The next prime is 13655633. The reversal of 13655617 is 71655631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6558721 + 7096896 = 2561^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 13655617 - 2⁷ = 13655489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13655611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14484 + ... + 15397.

It is an arithmetic number, because the mean of its divisors is an integer number (3421489).

Almost surely, 2^13655617 is an apocalyptic number.

It is an amenable number.

13655617 is a deficient number, since it is larger than the sum of its proper divisors (30339).

13655617 is an equidigital number, since it uses as much as digits as its factorization.

13655617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30338.

The product of its digits is 18900, while the sum is 34.

The square root of 13655617 is about 3695.3507276035. The cubic root of 13655617 is about 239.0215779728.

The spelling of 13655617 in words is "thirteen million, six hundred fifty-five thousand, six hundred seventeen".