13907557 has 2 divisors, whose sum is σ = 13907558. Its totient is φ = 13907556.

The previous prime is 13907549. The next prime is 13907567. The reversal of 13907557 is 75570931.

It is a happy number.

13907557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13905441 + 2116 = 3729^2 + 46^2 .

It is a cyclic number.

It is not a de Polignac number, because 13907557 - 2³ = 13907549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13907507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6953778 + 6953779.

It is an arithmetic number, because the mean of its divisors is an integer number (6953779).

Almost surely, 2^13907557 is an apocalyptic number.

It is an amenable number.

13907557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13907557 is an equidigital number, since it uses as much as digits as its factorization.

13907557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 13907557 is about 3729.2837113848. The cubic root of 13907557 is about 240.4825764698.

The spelling of 13907557 in words is "thirteen million, nine hundred seven thousand, five hundred fifty-seven".