2311957 has 2 divisors, whose sum is σ = 2311958. Its totient is φ = 2311956.

The previous prime is 2311931. The next prime is 2311993. The reversal of 2311957 is 7591132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2047761 + 264196 = 1431^2 + 514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2311957 is a prime.

2311957 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155978 + 1155979.

It is an arithmetic number, because the mean of its divisors is an integer number (1155979).

2^2311957 is an apocalyptic number.

It is an amenable number.

2311957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311957 is an equidigital number, since it uses as much as digits as its factorization.

2311957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 28.

The square root of 2311957 is about 1520.5120847925. The cubic root of 2311957 is about 132.2289606004.

The spelling of 2311957 in words is "two million, three hundred eleven thousand, nine hundred fifty-seven".