268992881 has 2 divisors, whose sum is σ = 268992882. Its totient is φ = 268992880.

The previous prime is 268992863. The next prime is 268992917. The reversal of 268992881 is 188299862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267649600 + 1343281 = 16360^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 268992881 - 2⁶ = 268992817 is a prime.

It is a super-2 number, since 2×268992881² = 144714340057360322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268992851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134496440 + 134496441.

It is an arithmetic number, because the mean of its divisors is an integer number (134496441).

Almost surely, 2^268992881 is an apocalyptic number.

It is an amenable number.

268992881 is a deficient number, since it is larger than the sum of its proper divisors (1).

268992881 is an equidigital number, since it uses as much as digits as its factorization.

268992881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 53.

The square root of 268992881 is about 16401.0024388755. The cubic root of 268992881 is about 645.5257864481.

The spelling of 268992881 in words is "two hundred sixty-eight million, nine hundred ninety-two thousand, eight hundred eighty-one".