268424809 has 2 divisors, whose sum is σ = 268424810. Its totient is φ = 268424808.

The previous prime is 268424797. The next prime is 268424873. The reversal of 268424809 is 908424862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268304400 + 120409 = 16380^2 + 347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268424809 is a prime.

It is not a weakly prime, because it can be changed into another prime (268424879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134212404 + 134212405.

It is an arithmetic number, because the mean of its divisors is an integer number (134212405).

Almost surely, 2^268424809 is an apocalyptic number.

It is an amenable number.

268424809 is a deficient number, since it is larger than the sum of its proper divisors (1).

268424809 is an equidigital number, since it uses as much as digits as its factorization.

268424809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 268424809 is about 16383.6750761238. The cubic root of 268424809 is about 645.0710488007.

The spelling of 268424809 in words is "two hundred sixty-eight million, four hundred twenty-four thousand, eight hundred nine".