231791023 has 2 divisors, whose sum is σ = 231791024. Its totient is φ = 231791022.

The previous prime is 231791009. The next prime is 231791057. The reversal of 231791023 is 320197132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231791023 - 2⁵ = 231790991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231790982 and 231791000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231791093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115895511 + 115895512.

It is an arithmetic number, because the mean of its divisors is an integer number (115895512).

Almost surely, 2^231791023 is an apocalyptic number.

231791023 is a deficient number, since it is larger than the sum of its proper divisors (1).

231791023 is an equidigital number, since it uses as much as digits as its factorization.

231791023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 231791023 is about 15224.6846601169. The cubic root of 231791023 is about 614.2788144400.

The spelling of 231791023 in words is "two hundred thirty-one million, seven hundred ninety-one thousand, twenty-three".