11807971 has 12 divisors (see below), whose sum is σ = 13793088. Its totient is φ = 10078992.

The previous prime is 11807941. The next prime is 11807977. The reversal of 11807971 is 17970811.

11807971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-11807971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11807977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19150 + ... + 19756.

It is an arithmetic number, because the mean of its divisors is an integer number (1149424).

Almost surely, 2^11807971 is an apocalyptic number.

11807971 is a deficient number, since it is larger than the sum of its proper divisors (1985117).

11807971 is an equidigital number, since it uses as much as digits as its factorization.

11807971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 34.

The square root of 11807971 is about 3436.2728355007. The cubic root of 11807971 is about 227.7150629024.

The spelling of 11807971 in words is "eleven million, eight hundred seven thousand, nine hundred seventy-one".