268554691 has 2 divisors, whose sum is σ = 268554692. Its totient is φ = 268554690.

The previous prime is 268554677. The next prime is 268554701. The reversal of 268554691 is 196455862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268554691 - 2⁹ = 268554179 is a prime.

It is not a weakly prime, because it can be changed into another prime (268554631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134277345 + 134277346.

It is an arithmetic number, because the mean of its divisors is an integer number (134277346).

Almost surely, 2^268554691 is an apocalyptic number.

268554691 is a deficient number, since it is larger than the sum of its proper divisors (1).

268554691 is an equidigital number, since it uses as much as digits as its factorization.

268554691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 46.

The square root of 268554691 is about 16387.6383594464. The cubic root of 268554691 is about 645.1750749630.

The spelling of 268554691 in words is "two hundred sixty-eight million, five hundred fifty-four thousand, six hundred ninety-one".