231426791 has 2 divisors, whose sum is σ = 231426792. Its totient is φ = 231426790.

The previous prime is 231426761. The next prime is 231426847. The reversal of 231426791 is 197624132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231426791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231426721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115713395 + 115713396.

It is an arithmetic number, because the mean of its divisors is an integer number (115713396).

Almost surely, 2^231426791 is an apocalyptic number.

231426791 is a deficient number, since it is larger than the sum of its proper divisors (1).

231426791 is an equidigital number, since it uses as much as digits as its factorization.

231426791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 231426791 is about 15212.7180674592. The cubic root of 231426791 is about 613.9568904151.

The spelling of 231426791 in words is "two hundred thirty-one million, four hundred twenty-six thousand, seven hundred ninety-one".