231240797 has 2 divisors, whose sum is σ = 231240798. Its totient is φ = 231240796.

The previous prime is 231240761. The next prime is 231240839. The reversal of 231240797 is 797042132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230857636 + 383161 = 15194^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 231240797 - 2⁶ = 231240733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231240707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115620398 + 115620399.

It is an arithmetic number, because the mean of its divisors is an integer number (115620399).

Almost surely, 2^231240797 is an apocalyptic number.

It is an amenable number.

231240797 is a deficient number, since it is larger than the sum of its proper divisors (1).

231240797 is an equidigital number, since it uses as much as digits as its factorization.

231240797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 231240797 is about 15206.6037299589. The cubic root of 231240797 is about 613.7923705648.

The spelling of 231240797 in words is "two hundred thirty-one million, two hundred forty thousand, seven hundred ninety-seven".