13318939 has 8 divisors (see below), whose sum is σ = 14262480. Its totient is φ = 12393216.

The previous prime is 13318919. The next prime is 13318951. The reversal of 13318939 is 93981331.

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 13318939 - 2¹⁵ = 13286171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13318898 and 13318907.

It is not an unprimeable number, because it can be changed into a prime (13318919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2889 + ... + 5914.

It is an arithmetic number, because the mean of its divisors is an integer number (1782810).

Almost surely, 2^13318939 is an apocalyptic number.

13318939 is a deficient number, since it is larger than the sum of its proper divisors (943541).

13318939 is an equidigital number, since it uses as much as digits as its factorization.

13318939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8909.

The product of its digits is 17496, while the sum is 37.

The square root of 13318939 is about 3649.5121591796. The cubic root of 13318939 is about 237.0408577271.

The spelling of 13318939 in words is "thirteen million, three hundred eighteen thousand, nine hundred thirty-nine".