123231990767 has 2 divisors, whose sum is σ = 123231990768. Its totient is φ = 123231990766.

The previous prime is 123231990737. The next prime is 123231990773. The reversal of 123231990767 is 767099132321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123231990767 - 2³⁰ = 122158248943 is a prime.

It is a super-2 number, since 2×123231990767² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123231990737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61615995383 + 61615995384.

It is an arithmetic number, because the mean of its divisors is an integer number (61615995384).

Almost surely, 2^123231990767 is an apocalyptic number.

123231990767 is a deficient number, since it is larger than the sum of its proper divisors (1).

123231990767 is an equidigital number, since it uses as much as digits as its factorization.

123231990767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 857304, while the sum is 50.

The spelling of 123231990767 in words is "one hundred twenty-three billion, two hundred thirty-one million, nine hundred ninety thousand, seven hundred sixty-seven".