268563731 has 2 divisors, whose sum is σ = 268563732. Its totient is φ = 268563730.

The previous prime is 268563721. The next prime is 268563733. The reversal of 268563731 is 137365862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268563731 is a prime.

It is a super-2 number, since 2×268563731² = 144252955217280722, which contains 22 as substring.

Together with 268563733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268563733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134281865 + 134281866.

It is an arithmetic number, because the mean of its divisors is an integer number (134281866).

Almost surely, 2^268563731 is an apocalyptic number.

268563731 is a deficient number, since it is larger than the sum of its proper divisors (1).

268563731 is an equidigital number, since it uses as much as digits as its factorization.

268563731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 268563731 is about 16387.9141747814. The cubic root of 268563731 is about 645.1823141058.

The spelling of 268563731 in words is "two hundred sixty-eight million, five hundred sixty-three thousand, seven hundred thirty-one".