117968309 has 2 divisors, whose sum is σ = 117968310. Its totient is φ = 117968308.

The previous prime is 117968293. The next prime is 117968329. The reversal of 117968309 is 903869711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81848209 + 36120100 = 9047^2 + 6010^2 .

It is a cyclic number.

It is not a de Polignac number, because 117968309 - 2⁴ = 117968293 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117968309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117968329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58984154 + 58984155.

It is an arithmetic number, because the mean of its divisors is an integer number (58984155).

Almost surely, 2^117968309 is an apocalyptic number.

It is an amenable number.

117968309 is a deficient number, since it is larger than the sum of its proper divisors (1).

117968309 is an equidigital number, since it uses as much as digits as its factorization.

117968309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 117968309 is about 10861.3216967365. The cubic root of 117968309 is about 490.4428995667.

The spelling of 117968309 in words is "one hundred seventeen million, nine hundred sixty-eight thousand, three hundred nine".