168109313 has 2 divisors, whose sum is σ = 168109314. Its totient is φ = 168109312.

The previous prime is 168109303. The next prime is 168109339. The reversal of 168109313 is 313901861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155950144 + 12159169 = 12488^2 + 3487^2 .

It is a cyclic number.

It is not a de Polignac number, because 168109313 - 2⁴ = 168109297 is a prime.

It is a super-2 number, since 2×168109313² = 56521482234663938, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 168109313.

It is not a weakly prime, because it can be changed into another prime (168109303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84054656 + 84054657.

It is an arithmetic number, because the mean of its divisors is an integer number (84054657).

Almost surely, 2^168109313 is an apocalyptic number.

It is an amenable number.

168109313 is a deficient number, since it is larger than the sum of its proper divisors (1).

168109313 is an equidigital number, since it uses as much as digits as its factorization.

168109313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 168109313 is about 12965.6975516167. The cubic root of 168109313 is about 551.9044864234.

The spelling of 168109313 in words is "one hundred sixty-eight million, one hundred nine thousand, three hundred thirteen".