13608635 has 4 divisors (see below), whose sum is σ = 16330368. Its totient is φ = 10886904.

The previous prime is 13608631. The next prime is 13608649. The reversal of 13608635 is 53680631.

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

It is a cyclic number.

It is not a de Polignac number, because 13608635 - 2² = 13608631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13608631) 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, 1360859 + ... + 1360868.

It is an arithmetic number, because the mean of its divisors is an integer number (4082592).

Almost surely, 2^13608635 is an apocalyptic number.

13608635 is a deficient number, since it is larger than the sum of its proper divisors (2721733).

13608635 is an equidigital number, since it uses as much as digits as its factorization.

13608635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721732.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 13608635 is about 3688.9883437062. The cubic root of 13608635 is about 238.7471459688.

The spelling of 13608635 in words is "thirteen million, six hundred eight thousand, six hundred thirty-five".