231023929 has 2 divisors, whose sum is σ = 231023930. Its totient is φ = 231023928.

The previous prime is 231023899. The next prime is 231023939. The reversal of 231023929 is 929320132.

It is a happy number.

231023929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200165904 + 30858025 = 14148^2 + 5555^2 .

It is a cyclic number.

It is not a de Polignac number, because 231023929 - 2⁷ = 231023801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231023929.

It is not a weakly prime, because it can be changed into another prime (231023939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115511964 + 115511965.

It is an arithmetic number, because the mean of its divisors is an integer number (115511965).

Almost surely, 2^231023929 is an apocalyptic number.

It is an amenable number.

231023929 is a deficient number, since it is larger than the sum of its proper divisors (1).

231023929 is an equidigital number, since it uses as much as digits as its factorization.

231023929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 231023929 is about 15199.4713394907. The cubic root of 231023929 is about 613.6004298692.

The spelling of 231023929 in words is "two hundred thirty-one million, twenty-three thousand, nine hundred twenty-nine".