11591957 has 16 divisors (see below), whose sum is σ = 13345920. Its totient is φ = 9979200.

The previous prime is 11591953. The next prime is 11592043. The reversal of 11591957 is 75919511.

It is a cyclic number.

It is not a de Polignac number, because 11591957 - 2² = 11591953 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 11591957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11591953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17207 + ... + 17867.

It is an arithmetic number, because the mean of its divisors is an integer number (834120).

Almost surely, 2^11591957 is an apocalyptic number.

It is an amenable number.

11591957 is a deficient number, since it is larger than the sum of its proper divisors (1753963).

11591957 is a wasteful number, since it uses less digits than its factorization.

11591957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

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

The square root of 11591957 is about 3404.6963153856. The cubic root of 11591957 is about 226.3179082502.

The spelling of 11591957 in words is "eleven million, five hundred ninety-one thousand, nine hundred fifty-seven".