117680909 has 2 divisors, whose sum is σ = 117680910. Its totient is φ = 117680908.

The previous prime is 117680863. The next prime is 117680917. The reversal of 117680909 is 909086711.

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., 63952009 + 53728900 = 7997^2 + 7330^2 .

It is a cyclic number.

It is not a de Polignac number, because 117680909 - 2¹² = 117676813 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 (117680009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58840454 + 58840455.

It is an arithmetic number, because the mean of its divisors is an integer number (58840455).

Almost surely, 2^117680909 is an apocalyptic number.

It is an amenable number.

117680909 is a deficient number, since it is larger than the sum of its proper divisors (1).

117680909 is an equidigital number, since it uses as much as digits as its factorization.

117680909 is an odious number, because the sum of its binary digits is odd.

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

The square root of 117680909 is about 10848.0831947400. The cubic root of 117680909 is about 490.0442955930.

The spelling of 117680909 in words is "one hundred seventeen million, six hundred eighty thousand, nine hundred nine".