117217279 has 2 divisors, whose sum is σ = 117217280. Its totient is φ = 117217278.

The previous prime is 117217241. The next prime is 117217283. The reversal of 117217279 is 972712711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117217279 - 2⁷ = 117217151 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 (117217679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58608639 + 58608640.

It is an arithmetic number, because the mean of its divisors is an integer number (58608640).

Almost surely, 2^117217279 is an apocalyptic number.

117217279 is a deficient number, since it is larger than the sum of its proper divisors (1).

117217279 is an equidigital number, since it uses as much as digits as its factorization.

117217279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12348, while the sum is 37.

The square root of 117217279 is about 10826.6928930306. The cubic root of 117217279 is about 489.3999026021.

The spelling of 117217279 in words is "one hundred seventeen million, two hundred seventeen thousand, two hundred seventy-nine".