117915211 has 2 divisors, whose sum is σ = 117915212. Its totient is φ = 117915210.

The previous prime is 117915209. The next prime is 117915223. The reversal of 117915211 is 112519711.

It is a weak prime.

It is an emirp because it is prime and its reverse (112519711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117915211 - 2¹ = 117915209 is a prime.

Together with 117915209, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 117915211.

It is not a weakly prime, because it can be changed into another prime (117915241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58957605 + 58957606.

It is an arithmetic number, because the mean of its divisors is an integer number (58957606).

Almost surely, 2^117915211 is an apocalyptic number.

117915211 is a deficient number, since it is larger than the sum of its proper divisors (1).

117915211 is an equidigital number, since it uses as much as digits as its factorization.

117915211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 28.

The square root of 117915211 is about 10858.8770598069. The cubic root of 117915211 is about 490.3693050976.

The spelling of 117915211 in words is "one hundred seventeen million, nine hundred fifteen thousand, two hundred eleven".