268983257 has 2 divisors, whose sum is σ = 268983258. Its totient is φ = 268983256.

The previous prime is 268983227. The next prime is 268983259. The reversal of 268983257 is 752389862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209554576 + 59428681 = 14476^2 + 7709^2 .

It is a cyclic number.

It is not a de Polignac number, because 268983257 - 2⁶ = 268983193 is a prime.

Together with 268983259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268983259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134491628 + 134491629.

It is an arithmetic number, because the mean of its divisors is an integer number (134491629).

Almost surely, 2^268983257 is an apocalyptic number.

It is an amenable number.

268983257 is a deficient number, since it is larger than the sum of its proper divisors (1).

268983257 is an equidigital number, since it uses as much as digits as its factorization.

268983257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The square root of 268983257 is about 16400.7090395507. The cubic root of 268983257 is about 645.5180878376.

The spelling of 268983257 in words is "two hundred sixty-eight million, nine hundred eighty-three thousand, two hundred fifty-seven".