268806731 has 2 divisors, whose sum is σ = 268806732. Its totient is φ = 268806730.

The previous prime is 268806709. The next prime is 268806749. The reversal of 268806731 is 137608862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268806731 - 2¹⁰ = 268805707 is a prime.

It is a super-2 number, since 2×268806731² = 144514117261812722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (268806751) 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, 134403365 + 134403366.

It is an arithmetic number, because the mean of its divisors is an integer number (134403366).

Almost surely, 2^268806731 is an apocalyptic number.

268806731 is a deficient number, since it is larger than the sum of its proper divisors (1).

268806731 is an equidigital number, since it uses as much as digits as its factorization.

268806731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 268806731 is about 16395.3264987313. The cubic root of 268806731 is about 645.3768452638.

The spelling of 268806731 in words is "two hundred sixty-eight million, eight hundred six thousand, seven hundred thirty-one".