231304399589 has 2 divisors, whose sum is σ = 231304399590. Its totient is φ = 231304399588.

The previous prime is 231304399559. The next prime is 231304399597. The reversal of 231304399589 is 985993403132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149021477089 + 82282922500 = 386033^2 + 286850^2 .

It is a cyclic number.

It is not a de Polignac number, because 231304399589 - 2²⁴ = 231287622373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231304399559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115652199794 + 115652199795.

It is an arithmetic number, because the mean of its divisors is an integer number (115652199795).

Almost surely, 2^231304399589 is an apocalyptic number.

It is an amenable number.

231304399589 is a deficient number, since it is larger than the sum of its proper divisors (1).

231304399589 is an equidigital number, since it uses as much as digits as its factorization.

231304399589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6298560, while the sum is 56.

The spelling of 231304399589 in words is "two hundred thirty-one billion, three hundred four million, three hundred ninety-nine thousand, five hundred eighty-nine".