231312079289 has 2 divisors, whose sum is σ = 231312079290. Its totient is φ = 231312079288.

The previous prime is 231312079279. The next prime is 231312079291. The reversal of 231312079289 is 982970213132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189729936400 + 41582142889 = 435580^2 + 203917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231312079289 is a prime.

Together with 231312079291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231312079279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115656039644 + 115656039645.

It is an arithmetic number, because the mean of its divisors is an integer number (115656039645).

Almost surely, 2^231312079289 is an apocalyptic number.

It is an amenable number.

231312079289 is a deficient number, since it is larger than the sum of its proper divisors (1).

231312079289 is an equidigital number, since it uses as much as digits as its factorization.

231312079289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 231312079289 in words is "two hundred thirty-one billion, three hundred twelve million, seventy-nine thousand, two hundred eighty-nine".