268980913 has 2 divisors, whose sum is σ = 268980914. Its totient is φ = 268980912.

The previous prime is 268980911. The next prime is 268980917. The reversal of 268980913 is 319089862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158457744 + 110523169 = 12588^2 + 10513^2 .

It is a cyclic number.

It is not a de Polignac number, because 268980913 - 2¹ = 268980911 is a prime.

Together with 268980911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (268980911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134490456 + 134490457.

It is an arithmetic number, because the mean of its divisors is an integer number (134490457).

Almost surely, 2^268980913 is an apocalyptic number.

It is an amenable number.

268980913 is a deficient number, since it is larger than the sum of its proper divisors (1).

268980913 is an equidigital number, since it uses as much as digits as its factorization.

268980913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 268980913 is about 16400.6375790699. The cubic root of 268980913 is about 645.5162127534.

The spelling of 268980913 in words is "two hundred sixty-eight million, nine hundred eighty thousand, nine hundred thirteen".