268521299 has 2 divisors, whose sum is σ = 268521300. Its totient is φ = 268521298.

The previous prime is 268521269. The next prime is 268521359. The reversal of 268521299 is 992125862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268521299 - 2¹⁶ = 268455763 is a prime.

It is not a weakly prime, because it can be changed into another prime (268521269) 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, 134260649 + 134260650.

It is an arithmetic number, because the mean of its divisors is an integer number (134260650).

Almost surely, 2^268521299 is an apocalyptic number.

268521299 is a deficient number, since it is larger than the sum of its proper divisors (1).

268521299 is an equidigital number, since it uses as much as digits as its factorization.

268521299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 268521299 is about 16386.6195110523. The cubic root of 268521299 is about 645.1483335707.

The spelling of 268521299 in words is "two hundred sixty-eight million, five hundred twenty-one thousand, two hundred ninety-nine".