231689812919 has 2 divisors, whose sum is σ = 231689812920. Its totient is φ = 231689812918.

The previous prime is 231689812909. The next prime is 231689812931. The reversal of 231689812919 is 919218986132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231689812919 - 2⁸ = 231689812663 is a prime.

It is a super-2 number, since 2×231689812919² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231689812909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115844906459 + 115844906460.

It is an arithmetic number, because the mean of its divisors is an integer number (115844906460).

Almost surely, 2^231689812919 is an apocalyptic number.

231689812919 is a deficient number, since it is larger than the sum of its proper divisors (1).

231689812919 is an equidigital number, since it uses as much as digits as its factorization.

231689812919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 59.

The spelling of 231689812919 in words is "two hundred thirty-one billion, six hundred eighty-nine million, eight hundred twelve thousand, nine hundred nineteen".