231338999 has 2 divisors, whose sum is σ = 231339000. Its totient is φ = 231338998.

The previous prime is 231338981. The next prime is 231339089. The reversal of 231338999 is 999833132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231338999 - 2⁸ = 231338743 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 (231338909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115669499 + 115669500.

It is an arithmetic number, because the mean of its divisors is an integer number (115669500).

Almost surely, 2^231338999 is an apocalyptic number.

231338999 is a deficient number, since it is larger than the sum of its proper divisors (1).

231338999 is an equidigital number, since it uses as much as digits as its factorization.

231338999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 47.

The square root of 231338999 is about 15209.8323133426. The cubic root of 231338999 is about 613.8792455290.

The spelling of 231338999 in words is "two hundred thirty-one million, three hundred thirty-eight thousand, nine hundred ninety-nine".