268813057 has 2 divisors, whose sum is σ = 268813058. Its totient is φ = 268813056.

The previous prime is 268813033. The next prime is 268813079. The reversal of 268813057 is 750318862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255968001 + 12845056 = 15999^2 + 3584^2 .

It is a cyclic number.

It is not a de Polignac number, because 268813057 - 2²³ = 260424449 is a prime.

It is a super-2 number, since 2×268813057² = 144520919227370498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (268810057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134406528 + 134406529.

It is an arithmetic number, because the mean of its divisors is an integer number (134406529).

Almost surely, 2^268813057 is an apocalyptic number.

It is an amenable number.

268813057 is a deficient number, since it is larger than the sum of its proper divisors (1).

268813057 is an equidigital number, since it uses as much as digits as its factorization.

268813057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 268813057 is about 16395.5194184265. The cubic root of 268813057 is about 645.3819079122.

The spelling of 268813057 in words is "two hundred sixty-eight million, eight hundred thirteen thousand, fifty-seven".