117655217 has 2 divisors, whose sum is σ = 117655218. Its totient is φ = 117655216.

The previous prime is 117655207. The next prime is 117655259. The reversal of 117655217 is 712556711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73685056 + 43970161 = 8584^2 + 6631^2 .

It is an emirp because it is prime and its reverse (712556711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117655217 is a prime.

It is not a weakly prime, because it can be changed into another prime (117655207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58827608 + 58827609.

It is an arithmetic number, because the mean of its divisors is an integer number (58827609).

Almost surely, 2^117655217 is an apocalyptic number.

It is an amenable number.

117655217 is a deficient number, since it is larger than the sum of its proper divisors (1).

117655217 is an equidigital number, since it uses as much as digits as its factorization.

117655217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 35.

The square root of 117655217 is about 10846.8989577667. The cubic root of 117655217 is about 490.0086309739.

The spelling of 117655217 in words is "one hundred seventeen million, six hundred fifty-five thousand, two hundred seventeen".