268786009 has 2 divisors, whose sum is σ = 268786010. Its totient is φ = 268786008.

The previous prime is 268786003. The next prime is 268786013. The reversal of 268786009 is 900687862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252810000 + 15976009 = 15900^2 + 3997^2 .

It is a cyclic number.

It is not a de Polignac number, because 268786009 - 2⁹ = 268785497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 268786009.

It is not a weakly prime, because it can be changed into another prime (268786003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134393004 + 134393005.

It is an arithmetic number, because the mean of its divisors is an integer number (134393005).

Almost surely, 2^268786009 is an apocalyptic number.

It is an amenable number.

268786009 is a deficient number, since it is larger than the sum of its proper divisors (1).

268786009 is an equidigital number, since it uses as much as digits as its factorization.

268786009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 268786009 is about 16394.6945381730. The cubic root of 268786009 is about 645.3602610528.

The spelling of 268786009 in words is "two hundred sixty-eight million, seven hundred eighty-six thousand, nine".