999431023 has 2 divisors, whose sum is σ = 999431024. Its totient is φ = 999431022.

The previous prime is 999431021. The next prime is 999431051. The reversal of 999431023 is 320134999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999431023 - 2¹ = 999431021 is a prime.

Together with 999431021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999431021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499715511 + 499715512.

It is an arithmetic number, because the mean of its divisors is an integer number (499715512).

Almost surely, 2^999431023 is an apocalyptic number.

999431023 is a deficient number, since it is larger than the sum of its proper divisors (1).

999431023 is an equidigital number, since it uses as much as digits as its factorization.

999431023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 999431023 is about 31613.7790053641. The cubic root of 999431023 is about 999.8103050181.

The spelling of 999431023 in words is "nine hundred ninety-nine million, four hundred thirty-one thousand, twenty-three".