2311979 has 4 divisors (see below), whose sum is σ = 2316600. Its totient is φ = 2307360.

The previous prime is 2311957. The next prime is 2311993. The reversal of 2311979 is 9791132.

It is a happy number.

2311979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2311979 - 2²⁰ = 1263403 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 (2311079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454 + ... + 2595.

It is an arithmetic number, because the mean of its divisors is an integer number (579150).

2^2311979 is an apocalyptic number.

2311979 is a deficient number, since it is larger than the sum of its proper divisors (4621).

2311979 is an equidigital number, since it uses as much as digits as its factorization.

2311979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620.

The product of its digits is 3402, while the sum is 32.

The square root of 2311979 is about 1520.5193191801. The cubic root of 2311979 is about 132.2293800183.

The spelling of 2311979 in words is "two million, three hundred eleven thousand, nine hundred seventy-nine".