11897957 has 2 divisors, whose sum is σ = 11897958. Its totient is φ = 11897956.

The previous prime is 11897939. The next prime is 11897993. The reversal of 11897957 is 75979811.

11897957 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., 11621281 + 276676 = 3409^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 11897957 - 2⁸ = 11897701 is a prime.

It is a super-2 number, since 2×11897957² = 283122761547698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11897057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5948978 + 5948979.

It is an arithmetic number, because the mean of its divisors is an integer number (5948979).

Almost surely, 2^11897957 is an apocalyptic number.

It is an amenable number.

11897957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11897957 is an equidigital number, since it uses as much as digits as its factorization.

11897957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 47.

The square root of 11897957 is about 3449.3415313651. The cubic root of 11897957 is about 228.2920554553.

The spelling of 11897957 in words is "eleven million, eight hundred ninety-seven thousand, nine hundred fifty-seven".