268915789 has 2 divisors, whose sum is σ = 268915790. Its totient is φ = 268915788.

The previous prime is 268915783. The next prime is 268915807. The reversal of 268915789 is 987519862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232410025 + 36505764 = 15245^2 + 6042^2 .

It is a cyclic number.

It is not a de Polignac number, because 268915789 - 2⁹ = 268915277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268915783) 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, 134457894 + 134457895.

It is an arithmetic number, because the mean of its divisors is an integer number (134457895).

Almost surely, 2^268915789 is an apocalyptic number.

It is an amenable number.

268915789 is a deficient number, since it is larger than the sum of its proper divisors (1).

268915789 is an equidigital number, since it uses as much as digits as its factorization.

268915789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 55.

The square root of 268915789 is about 16398.6520482630. The cubic root of 268915789 is about 645.4641124134.

The spelling of 268915789 in words is "two hundred sixty-eight million, nine hundred fifteen thousand, seven hundred eighty-nine".