13807657 has 2 divisors, whose sum is σ = 13807658. Its totient is φ = 13807656.

The previous prime is 13807639. The next prime is 13807667. The reversal of 13807657 is 75670831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6948496 + 6859161 = 2636^2 + 2619^2 .

It is a cyclic number.

It is not a de Polignac number, because 13807657 - 2²³ = 5419049 is a prime.

It is not a weakly prime, because it can be changed into another prime (13807667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6903828 + 6903829.

It is an arithmetic number, because the mean of its divisors is an integer number (6903829).

Almost surely, 2^13807657 is an apocalyptic number.

It is an amenable number.

13807657 is a deficient number, since it is larger than the sum of its proper divisors (1).

13807657 is an equidigital number, since it uses as much as digits as its factorization.

13807657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 13807657 is about 3715.8655788389. The cubic root of 13807657 is about 239.9053851587.

The spelling of 13807657 in words is "thirteen million, eight hundred seven thousand, six hundred fifty-seven".