268618913 has 2 divisors, whose sum is σ = 268618914. Its totient is φ = 268618912.

The previous prime is 268618907. The next prime is 268618949. The reversal of 268618913 is 319816862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266897569 + 1721344 = 16337^2 + 1312^2 .

It is a cyclic number.

It is not a de Polignac number, because 268618913 - 2⁴ = 268618897 is a prime.

It is a super-2 number, since 2×268618913² = 144312240842603138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (268618013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134309456 + 134309457.

It is an arithmetic number, because the mean of its divisors is an integer number (134309457).

Almost surely, 2^268618913 is an apocalyptic number.

It is an amenable number.

268618913 is a deficient number, since it is larger than the sum of its proper divisors (1).

268618913 is an equidigital number, since it uses as much as digits as its factorization.

268618913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 268618913 is about 16389.5977070824. The cubic root of 268618913 is about 645.2264997846.

The spelling of 268618913 in words is "two hundred sixty-eight million, six hundred eighteen thousand, nine hundred thirteen".