13570813 has 2 divisors, whose sum is σ = 13570814. Its totient is φ = 13570812.

The previous prime is 13570801. The next prime is 13570819. The reversal of 13570813 is 31807531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13557124 + 13689 = 3682^2 + 117^2 .

It is a cyclic number.

It is not a de Polignac number, because 13570813 - 2²¹ = 11473661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13570819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6785406 + 6785407.

It is an arithmetic number, because the mean of its divisors is an integer number (6785407).

Almost surely, 2^13570813 is an apocalyptic number.

It is an amenable number.

13570813 is a deficient number, since it is larger than the sum of its proper divisors (1).

13570813 is an equidigital number, since it uses as much as digits as its factorization.

13570813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 13570813 is about 3683.8584391912. The cubic root of 13570813 is about 238.5257602338.

The spelling of 13570813 in words is "thirteen million, five hundred seventy thousand, eight hundred thirteen".