268988893 has 2 divisors, whose sum is σ = 268988894. Its totient is φ = 268988892.

The previous prime is 268988873. The next prime is 268988911. The reversal of 268988893 is 398889862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262342809 + 6646084 = 16197^2 + 2578^2 .

It is a cyclic number.

It is not a de Polignac number, because 268988893 - 2⁵ = 268988861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268988803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134494446 + 134494447.

It is an arithmetic number, because the mean of its divisors is an integer number (134494447).

Almost surely, 2^268988893 is an apocalyptic number.

It is an amenable number.

268988893 is a deficient number, since it is larger than the sum of its proper divisors (1).

268988893 is an equidigital number, since it uses as much as digits as its factorization.

268988893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11943936, while the sum is 61.

The square root of 268988893 is about 16400.8808604904. The cubic root of 268988893 is about 645.5225963147.

The spelling of 268988893 in words is "two hundred sixty-eight million, nine hundred eighty-eight thousand, eight hundred ninety-three".