11999957 has 4 divisors (see below), whose sum is σ = 12062976. Its totient is φ = 11936940.

The previous prime is 11999941. The next prime is 11999987. The reversal of 11999957 is 75999911.

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 11999957 - 2⁴ = 11999941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11999927) 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, 31223 + ... + 31604.

It is an arithmetic number, because the mean of its divisors is an integer number (3015744).

Almost surely, 2^11999957 is an apocalyptic number.

It is an amenable number.

11999957 is a deficient number, since it is larger than the sum of its proper divisors (63019).

11999957 is an equidigital number, since it uses as much as digits as its factorization.

11999957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63018.

The product of its digits is 229635, while the sum is 50.

The square root of 11999957 is about 3464.0954086168. The cubic root of 11999957 is about 228.9425750508.

The spelling of 11999957 in words is "eleven million, nine hundred ninety-nine thousand, nine hundred fifty-seven".