16117957 has 2 divisors, whose sum is σ = 16117958. Its totient is φ = 16117956.

The previous prime is 16117931. The next prime is 16117967. The reversal of 16117957 is 75971161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15476356 + 641601 = 3934^2 + 801^2 .

It is a cyclic number.

It is not a de Polignac number, because 16117957 - 2²³ = 7729349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16117967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8058978 + 8058979.

It is an arithmetic number, because the mean of its divisors is an integer number (8058979).

Almost surely, 2^16117957 is an apocalyptic number.

It is an amenable number.

16117957 is a deficient number, since it is larger than the sum of its proper divisors (1).

16117957 is an equidigital number, since it uses as much as digits as its factorization.

16117957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13230, while the sum is 37.

The square root of 16117957 is about 4014.7175492181. The cubic root of 16117957 is about 252.6019298957.

The spelling of 16117957 in words is "sixteen million, one hundred seventeen thousand, nine hundred fifty-seven".