13317639 has 4 divisors (see below), whose sum is σ = 17756856. Its totient is φ = 8878424.

The previous prime is 13317617. The next prime is 13317649. The reversal of 13317639 is 93671331.

13317639 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 13317639 - 2⁵ = 13317607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13317649) 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, 2219604 + ... + 2219609.

It is an arithmetic number, because the mean of its divisors is an integer number (4439214).

Almost surely, 2^13317639 is an apocalyptic number.

13317639 is a deficient number, since it is larger than the sum of its proper divisors (4439217).

13317639 is an equidigital number, since it uses as much as digits as its factorization.

13317639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4439216.

The product of its digits is 10206, while the sum is 33.

The square root of 13317639 is about 3649.3340488369. The cubic root of 13317639 is about 237.0331453225.

The spelling of 13317639 in words is "thirteen million, three hundred seventeen thousand, six hundred thirty-nine".