13564729 has 2 divisors, whose sum is σ = 13564730. Its totient is φ = 13564728.

The previous prime is 13564709. The next prime is 13564807. The reversal of 13564729 is 92746531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13155129 + 409600 = 3627^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 13564729 - 2⁷ = 13564601 is a prime.

It is not a weakly prime, because it can be changed into another prime (13564709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6782364 + 6782365.

It is an arithmetic number, because the mean of its divisors is an integer number (6782365).

Almost surely, 2^13564729 is an apocalyptic number.

It is an amenable number.

13564729 is a deficient number, since it is larger than the sum of its proper divisors (1).

13564729 is an equidigital number, since it uses as much as digits as its factorization.

13564729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 13564729 is about 3683.0325819900. The cubic root of 13564729 is about 238.4901100081.

The spelling of 13564729 in words is "thirteen million, five hundred sixty-four thousand, seven hundred twenty-nine".