117960809 has 2 divisors, whose sum is σ = 117960810. Its totient is φ = 117960808.

The previous prime is 117960769. The next prime is 117960823. The reversal of 117960809 is 908069711.

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., 112296409 + 5664400 = 10597^2 + 2380^2 .

It is an emirp because it is prime and its reverse (908069711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117960809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117960889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58980404 + 58980405.

It is an arithmetic number, because the mean of its divisors is an integer number (58980405).

Almost surely, 2^117960809 is an apocalyptic number.

It is an amenable number.

117960809 is a deficient number, since it is larger than the sum of its proper divisors (1).

117960809 is an equidigital number, since it uses as much as digits as its factorization.

117960809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 117960809 is about 10860.9764294008. The cubic root of 117960809 is about 490.4325058156.

The spelling of 117960809 in words is "one hundred seventeen million, nine hundred sixty thousand, eight hundred nine".