268786057 has 2 divisors, whose sum is σ = 268786058. Its totient is φ = 268786056.

The previous prime is 268786013. The next prime is 268786061. The reversal of 268786057 is 750687862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136328976 + 132457081 = 11676^2 + 11509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268786057 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 268786057.

It is not a weakly prime, because it can be changed into another prime (268786097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134393028 + 134393029.

It is an arithmetic number, because the mean of its divisors is an integer number (134393029).

Almost surely, 2^268786057 is an apocalyptic number.

It is an amenable number.

268786057 is a deficient number, since it is larger than the sum of its proper divisors (1).

268786057 is an equidigital number, since it uses as much as digits as its factorization.

268786057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The square root of 268786057 is about 16394.6960020612. The cubic root of 268786057 is about 645.3602994690.

The spelling of 268786057 in words is "two hundred sixty-eight million, seven hundred eighty-six thousand, fifty-seven".