117917279 has 2 divisors, whose sum is σ = 117917280. Its totient is φ = 117917278.

The previous prime is 117917263. The next prime is 117917299. The reversal of 117917279 is 972719711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117917279 - 2⁴ = 117917263 is a prime.

It is a Chen prime.

It is equal to p_6729794 and since 117917279 and 6729794 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117917299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58958639 + 58958640.

It is an arithmetic number, because the mean of its divisors is an integer number (58958640).

Almost surely, 2^117917279 is an apocalyptic number.

117917279 is a deficient number, since it is larger than the sum of its proper divisors (1).

117917279 is an equidigital number, since it uses as much as digits as its factorization.

117917279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55566, while the sum is 44.

The square root of 117917279 is about 10858.9722810218. The cubic root of 117917279 is about 490.3721717840.

The spelling of 117917279 in words is "one hundred seventeen million, nine hundred seventeen thousand, two hundred seventy-nine".