13315917 has 4 divisors (see below), whose sum is σ = 17754560. Its totient is φ = 8877276.

The previous prime is 13315909. The next prime is 13315921. The reversal of 13315917 is 71951331.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71951331 = 3 ⋅23983777.

It is not a de Polignac number, because 13315917 - 2³ = 13315909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13315937) 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, 2219317 + ... + 2219322.

It is an arithmetic number, because the mean of its divisors is an integer number (4438640).

Almost surely, 2^13315917 is an apocalyptic number.

It is an amenable number.

13315917 is a deficient number, since it is larger than the sum of its proper divisors (4438643).

13315917 is an equidigital number, since it uses as much as digits as its factorization.

13315917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438642.

The product of its digits is 2835, while the sum is 30.

The square root of 13315917 is about 3649.0981077521. The cubic root of 13315917 is about 237.0229285798.

The spelling of 13315917 in words is "thirteen million, three hundred fifteen thousand, nine hundred seventeen".