231358997 has 2 divisors, whose sum is σ = 231358998. Its totient is φ = 231358996.

The previous prime is 231358993. The next prime is 231359003. The reversal of 231358997 is 799853132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229855921 + 1503076 = 15161^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 231358997 - 2² = 231358993 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 (231358993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115679498 + 115679499.

It is an arithmetic number, because the mean of its divisors is an integer number (115679499).

Almost surely, 2^231358997 is an apocalyptic number.

It is an amenable number.

231358997 is a deficient number, since it is larger than the sum of its proper divisors (1).

231358997 is an equidigital number, since it uses as much as digits as its factorization.

231358997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 47.

The square root of 231358997 is about 15210.4897028334. The cubic root of 231358997 is about 613.8969338616.

The spelling of 231358997 in words is "two hundred thirty-one million, three hundred fifty-eight thousand, nine hundred ninety-seven".