3131121589 has 2 divisors, whose sum is σ = 3131121590. Its totient is φ = 3131121588.

The previous prime is 3131121527. The next prime is 3131121593. The reversal of 3131121589 is 9851211313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2812499089 + 318622500 = 53033^2 + 17850^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131121589 - 2²³ = 3122732981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131121509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565560794 + 1565560795.

It is an arithmetic number, because the mean of its divisors is an integer number (1565560795).

Almost surely, 2^3131121589 is an apocalyptic number.

It is an amenable number.

3131121589 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131121589 is an equidigital number, since it uses as much as digits as its factorization.

3131121589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 34.

The square root of 3131121589 is about 55956.4258061574. The cubic root of 3131121589 is about 1462.9628936190.

It can be divided in two parts, 31311 and 21589, that added together give a square (52900 = 230²).

The spelling of 3131121589 in words is "three billion, one hundred thirty-one million, one hundred twenty-one thousand, five hundred eighty-nine".