13197564 has 18 divisors (see below), whose sum is σ = 33360600. Its totient is φ = 4399176.

The previous prime is 13197563. The next prime is 13197601. The reversal of 13197564 is 46579131.

13197564 is a `hidden beast` number, since 1 + 3 + 1 + 97 + 564 = 666.

13197564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 366599 = 13197564 / (1 + 3 + 1 + 9 + 7 + 5 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13197563) 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, 183264 + ... + 183335.

Almost surely, 2^13197564 is an apocalyptic number.

It is an amenable number.

13197564 is an abundant number, since it is smaller than the sum of its proper divisors (20163036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13197564 is a wasteful number, since it uses less digits than its factorization.

13197564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366609 (or 366604 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 13197564 is about 3632.8451659822. The cubic root of 13197564 is about 236.3186111296.

The spelling of 13197564 in words is "thirteen million, one hundred ninety-seven thousand, five hundred sixty-four".