13604649 has 4 divisors (see below), whose sum is σ = 18139536. Its totient is φ = 9069764.

The previous prime is 13604639. The next prime is 13604653. The reversal of 13604649 is 94640631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13604649 - 2¹² = 13600553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13604609) 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, 2267439 + ... + 2267444.

It is an arithmetic number, because the mean of its divisors is an integer number (4534884).

Almost surely, 2^13604649 is an apocalyptic number.

It is an amenable number.

13604649 is a deficient number, since it is larger than the sum of its proper divisors (4534887).

13604649 is an equidigital number, since it uses as much as digits as its factorization.

13604649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534886.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 13604649 is about 3688.4480476211. The cubic root of 13604649 is about 238.7238338328.

The spelling of 13604649 in words is "thirteen million, six hundred four thousand, six hundred forty-nine".