13693957 has 2 divisors, whose sum is σ = 13693958. Its totient is φ = 13693956.

The previous prime is 13693919. The next prime is 13693961. The reversal of 13693957 is 75939631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13184161 + 509796 = 3631^2 + 714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13693957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13693907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6846978 + 6846979.

It is an arithmetic number, because the mean of its divisors is an integer number (6846979).

Almost surely, 2^13693957 is an apocalyptic number.

It is an amenable number.

13693957 is a deficient number, since it is larger than the sum of its proper divisors (1).

13693957 is an equidigital number, since it uses as much as digits as its factorization.

13693957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 43.

The square root of 13693957 is about 3700.5346910953. The cubic root of 13693957 is about 239.2450641318.

The spelling of 13693957 in words is "thirteen million, six hundred ninety-three thousand, nine hundred fifty-seven".