15397713 has 6 divisors (see below), whose sum is σ = 22241154. Its totient is φ = 10265136.

The previous prime is 15397703. The next prime is 15397729. The reversal of 15397713 is 31779351.

It can be written as a sum of positive squares in only one way, i.e., 8803089 + 6594624 = 2967^2 + 2568^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15397713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15397703) 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, 855420 + ... + 855437.

It is an arithmetic number, because the mean of its divisors is an integer number (3706859).

Almost surely, 2^15397713 is an apocalyptic number.

It is an amenable number.

15397713 is a deficient number, since it is larger than the sum of its proper divisors (6843441).

15397713 is a wasteful number, since it uses less digits than its factorization.

15397713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710863 (or 1710860 counting only the distinct ones).

The product of its digits is 19845, while the sum is 36.

The square root of 15397713 is about 3923.9919724689. The cubic root of 15397713 is about 248.7818770121.

It can be divided in two parts, 15397 and 713, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 15397713 in words is "fifteen million, three hundred ninety-seven thousand, seven hundred thirteen".