13315897 has 6 divisors (see below), whose sum is σ = 15489978. Its totient is φ = 11413584.

The previous prime is 13315891. The next prime is 13315909. The reversal of 13315897 is 79851331.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 670761 = 3556^2 + 819^2 .

It is not a de Polignac number, because 13315897 - 2³ = 13315889 is a prime.

It is a super-2 number, since 2×13315897² = 354626225829218, which contains 22 as substring.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (13315891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135828 + ... + 135925.

It is an arithmetic number, because the mean of its divisors is an integer number (2581663).

Almost surely, 2^13315897 is an apocalyptic number.

It is an amenable number.

13315897 is a deficient number, since it is larger than the sum of its proper divisors (2174081).

13315897 is an equidigital number, since it uses as much as digits as its factorization.

13315897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271767 (or 271760 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 13315897 is about 3649.0953673479. The cubic root of 13315897 is about 237.0228099133.

The spelling of 13315897 in words is "thirteen million, three hundred fifteen thousand, eight hundred ninety-seven".