311724572389 has 2 divisors, whose sum is σ = 311724572390. Its totient is φ = 311724572388.

The previous prime is 311724572311. The next prime is 311724572399. The reversal of 311724572389 is 983275427113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177086947489 + 134637624900 = 420817^2 + 366930^2 .

It is a cyclic number.

It is not a de Polignac number, because 311724572389 - 2⁷ = 311724572261 is a prime.

It is a super-2 number, since 2×311724572389² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311724572399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155862286194 + 155862286195.

It is an arithmetic number, because the mean of its divisors is an integer number (155862286195).

Almost surely, 2^311724572389 is an apocalyptic number.

It is an amenable number.

311724572389 is a deficient number, since it is larger than the sum of its proper divisors (1).

311724572389 is an equidigital number, since it uses as much as digits as its factorization.

311724572389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 52.

The spelling of 311724572389 in words is "three hundred eleven billion, seven hundred twenty-four million, five hundred seventy-two thousand, three hundred eighty-nine".