11915957 has 4 divisors (see below), whose sum is σ = 12169536. Its totient is φ = 11662380.

The previous prime is 11915933. The next prime is 11915999. The reversal of 11915957 is 75951911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11915957 - 2¹⁰ = 11914933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11915957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11915927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126719 + ... + 126812.

It is an arithmetic number, because the mean of its divisors is an integer number (3042384).

Almost surely, 2^11915957 is an apocalyptic number.

It is an amenable number.

11915957 is a deficient number, since it is larger than the sum of its proper divisors (253579).

11915957 is an equidigital number, since it uses as much as digits as its factorization.

11915957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253578.

The product of its digits is 14175, while the sum is 38.

The square root of 11915957 is about 3451.9497389157. The cubic root of 11915957 is about 228.4071224506.

The spelling of 11915957 in words is "eleven million, nine hundred fifteen thousand, nine hundred fifty-seven".