268168909 has 2 divisors, whose sum is σ = 268168910. Its totient is φ = 268168908.

The previous prime is 268168853. The next prime is 268168913. The reversal of 268168909 is 909861862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223412809 + 44756100 = 14947^2 + 6690^2 .

It is a cyclic number.

It is not a de Polignac number, because 268168909 - 2⁷ = 268168781 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268168919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134084454 + 134084455.

It is an arithmetic number, because the mean of its divisors is an integer number (134084455).

Almost surely, 2^268168909 is an apocalyptic number.

It is an amenable number.

268168909 is a deficient number, since it is larger than the sum of its proper divisors (1).

268168909 is an equidigital number, since it uses as much as digits as its factorization.

268168909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 268168909 is about 16375.8636108145. The cubic root of 268168909 is about 644.8659930324.

The spelling of 268168909 in words is "two hundred sixty-eight million, one hundred sixty-eight thousand, nine hundred nine".