231623999 has 2 divisors, whose sum is σ = 231624000. Its totient is φ = 231623998.

The previous prime is 231623993. The next prime is 231624017. The reversal of 231623999 is 999326132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231623999 - 2⁴ = 231623983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231623993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115811999 + 115812000.

It is an arithmetic number, because the mean of its divisors is an integer number (115812000).

Almost surely, 2^231623999 is an apocalyptic number.

231623999 is a deficient number, since it is larger than the sum of its proper divisors (1).

231623999 is an equidigital number, since it uses as much as digits as its factorization.

231623999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 44.

The square root of 231623999 is about 15219.1983691652. The cubic root of 231623999 is about 614.1312332885.

The spelling of 231623999 in words is "two hundred thirty-one million, six hundred twenty-three thousand, nine hundred ninety-nine".