2311993 has 2 divisors, whose sum is σ = 2311994. Its totient is φ = 2311992.

The previous prime is 2311957. The next prime is 2312021. The reversal of 2311993 is 3991132.

2311993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2312021) can be obtained adding 2311993 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2229049 + 82944 = 1493^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311993 - 2¹⁷ = 2180921 is a prime.

It is not a weakly prime, because it can be changed into another prime (2311193) 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 as a sum of consecutive naturals, namely, 1155996 + 1155997.

It is an arithmetic number, because the mean of its divisors is an integer number (1155997).

2^2311993 is an apocalyptic number.

It is an amenable number.

2311993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311993 is an equidigital number, since it uses as much as digits as its factorization.

2311993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 28.

The square root of 2311993 is about 1520.5239228634. The cubic root of 2311993 is about 132.2296469191.

The spelling of 2311993 in words is "two million, three hundred eleven thousand, nine hundred ninety-three".