268490779 has 2 divisors, whose sum is σ = 268490780. Its totient is φ = 268490778.

The previous prime is 268490777. The next prime is 268490797. The reversal of 268490779 is 977094862.

Together with next prime (268490797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268490779 - 2¹ = 268490777 is a prime.

Together with 268490777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (268490771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134245389 + 134245390.

It is an arithmetic number, because the mean of its divisors is an integer number (134245390).

Almost surely, 2^268490779 is an apocalyptic number.

268490779 is a deficient number, since it is larger than the sum of its proper divisors (1).

268490779 is an equidigital number, since it uses as much as digits as its factorization.

268490779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 268490779 is about 16385.6882369951. The cubic root of 268490779 is about 645.1238902295.

The spelling of 268490779 in words is "two hundred sixty-eight million, four hundred ninety thousand, seven hundred seventy-nine".