13990657 has 2 divisors, whose sum is σ = 13990658. Its totient is φ = 13990656.

The previous prime is 13990637. The next prime is 13990667. The reversal of 13990657 is 75609931.

13990657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13549761 + 440896 = 3681^2 + 664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13990657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13990637) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6995328 + 6995329.

It is an arithmetic number, because the mean of its divisors is an integer number (6995329).

Almost surely, 2^13990657 is an apocalyptic number.

It is an amenable number.

13990657 is a deficient number, since it is larger than the sum of its proper divisors (1).

13990657 is an equidigital number, since it uses as much as digits as its factorization.

13990657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 13990657 is about 3740.4086675121. The cubic root of 13990657 is about 240.9606002980.

The spelling of 13990657 in words is "thirteen million, nine hundred ninety thousand, six hundred fifty-seven".