231389889408889 has 2 divisors, whose sum is σ = 231389889408890. Its totient is φ = 231389889408888.

The previous prime is 231389889408869. The next prime is 231389889408943. The reversal of 231389889408889 is 988804988983132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221735924640000 + 9653964768889 = 14890800^2 + 3107083^2 .

It is a cyclic number.

It is not a de Polignac number, because 231389889408889 - 2¹⁹ = 231389888884601 is a prime.

It is not a weakly prime, because it can be changed into another prime (231389889408869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115694944704444 + 115694944704445.

It is an arithmetic number, because the mean of its divisors is an integer number (115694944704445).

Almost surely, 2^{231389889408889} is an apocalyptic number.

It is an amenable number.

231389889408889 is a deficient number, since it is larger than the sum of its proper divisors (1).

231389889408889 is an equidigital number, since it uses as much as digits as its factorization.

231389889408889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13759414272, while the sum is 88.

The spelling of 231389889408889 in words is "two hundred thirty-one trillion, three hundred eighty-nine billion, eight hundred eighty-nine million, four hundred eight thousand, eight hundred eighty-nine".