117756217 has 4 divisors (see below), whose sum is σ = 117778176. Its totient is φ = 117734260.

The previous prime is 117756193. The next prime is 117756313. The reversal of 117756217 is 712657711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712657711 = 193 ⋅3692527.

It is a cyclic number.

It is not a de Polignac number, because 117756217 - 2¹⁹ = 117231929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117751217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2988 + ... + 15634.

It is an arithmetic number, because the mean of its divisors is an integer number (29444544).

Almost surely, 2^117756217 is an apocalyptic number.

It is an amenable number.

117756217 is a deficient number, since it is larger than the sum of its proper divisors (21959).

117756217 is an equidigital number, since it uses as much as digits as its factorization.

117756217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21958.

The product of its digits is 20580, while the sum is 37.

The square root of 117756217 is about 10851.5536675630. The cubic root of 117756217 is about 490.1488052846.

The spelling of 117756217 in words is "one hundred seventeen million, seven hundred fifty-six thousand, two hundred seventeen".