117544217 has 4 divisors (see below), whose sum is σ = 134336256. Its totient is φ = 100752180.

The previous prime is 117544213. The next prime is 117544223. The reversal of 117544217 is 712445711.

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: 712445711 = 16879 ⋅42209.

It is a cyclic number.

It is not a de Polignac number, because 117544217 - 2² = 117544213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117544211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8396009 + ... + 8396022.

It is an arithmetic number, because the mean of its divisors is an integer number (33584064).

Almost surely, 2^117544217 is an apocalyptic number.

It is an amenable number.

117544217 is a deficient number, since it is larger than the sum of its proper divisors (16792039).

117544217 is an equidigital number, since it uses as much as digits as its factorization.

117544217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16792038.

The product of its digits is 7840, while the sum is 32.

The square root of 117544217 is about 10841.7810806159. The cubic root of 117544217 is about 489.8544854597.

Adding to 117544217 its reverse (712445711), we get a palindrome (829989928).

The spelling of 117544217 in words is "one hundred seventeen million, five hundred forty-four thousand, two hundred seventeen".