13057817 has 4 divisors (see below), whose sum is σ = 13065060. Its totient is φ = 13050576.

The previous prime is 13057777. The next prime is 13057829. The reversal of 13057817 is 71875031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12823561 + 234256 = 3581^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 13057817 - 2⁶ = 13057753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13056817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1463 + ... + 5315.

It is an arithmetic number, because the mean of its divisors is an integer number (3266265).

Almost surely, 2^13057817 is an apocalyptic number.

It is an amenable number.

13057817 is a deficient number, since it is larger than the sum of its proper divisors (7243).

13057817 is an equidigital number, since it uses as much as digits as its factorization.

13057817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7242.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 13057817 is about 3613.5601558574. The cubic root of 13057817 is about 235.4815356292.

The spelling of 13057817 in words is "thirteen million, fifty-seven thousand, eight hundred seventeen".