268309577 has 2 divisors, whose sum is σ = 268309578. Its totient is φ = 268309576.

The previous prime is 268309571. The next prime is 268309579. The reversal of 268309577 is 775903862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150283081 + 118026496 = 12259^2 + 10864^2 .

It is a cyclic number.

It is not a de Polignac number, because 268309577 - 2¹² = 268305481 is a prime.

Together with 268309579, 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 (268309571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134154788 + 134154789.

It is an arithmetic number, because the mean of its divisors is an integer number (134154789).

Almost surely, 2^268309577 is an apocalyptic number.

It is an amenable number.

268309577 is a deficient number, since it is larger than the sum of its proper divisors (1).

268309577 is an equidigital number, since it uses as much as digits as its factorization.

268309577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 268309577 is about 16380.1580273207. The cubic root of 268309577 is about 644.9787281409.

The spelling of 268309577 in words is "two hundred sixty-eight million, three hundred nine thousand, five hundred seventy-seven".