31989999589 has 2 divisors, whose sum is σ = 31989999590. Its totient is φ = 31989999588.

The previous prime is 31989999529. The next prime is 31989999593. The reversal of 31989999589 is 98599998913.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17640355489 + 14349644100 = 132817^2 + 119790^2 .

It is a cyclic number.

It is not a de Polignac number, because 31989999589 - 2¹¹ = 31989997541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31989999529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15994999794 + 15994999795.

It is an arithmetic number, because the mean of its divisors is an integer number (15994999795).

Almost surely, 2^31989999589 is an apocalyptic number.

It is an amenable number.

31989999589 is a deficient number, since it is larger than the sum of its proper divisors (1).

31989999589 is an equidigital number, since it uses as much as digits as its factorization.

31989999589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 510183360, while the sum is 79.

The spelling of 31989999589 in words is "thirty-one billion, nine hundred eighty-nine million, nine hundred ninety-nine thousand, five hundred eighty-nine".