268992851 has 2 divisors, whose sum is σ = 268992852. Its totient is φ = 268992850.

The previous prime is 268992847. The next prime is 268992863. The reversal of 268992851 is 158299862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268992851 - 2² = 268992847 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 268992851.

It is not a weakly prime, because it can be changed into another prime (268992881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134496425 + 134496426.

It is an arithmetic number, because the mean of its divisors is an integer number (134496426).

Almost surely, 2^268992851 is an apocalyptic number.

268992851 is a deficient number, since it is larger than the sum of its proper divisors (1).

268992851 is an equidigital number, since it uses as much as digits as its factorization.

268992851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 50.

The square root of 268992851 is about 16401.0015242972. The cubic root of 268992851 is about 645.5257624502.

Subtracting from 268992851 its sum of digits (50), we obtain a square (268992801 = 16401²).

The spelling of 268992851 in words is "two hundred sixty-eight million, nine hundred ninety-two thousand, eight hundred fifty-one".