117155279 has 4 divisors (see below), whose sum is σ = 124046784. Its totient is φ = 110263776.

The previous prime is 117155267. The next prime is 117155303. The reversal of 117155279 is 972551711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 972551711 = 23 ⋅42284857.

It is a cyclic number.

It is not a de Polignac number, because 117155279 - 2⁸ = 117155023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117125279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3445727 + ... + 3445760.

It is an arithmetic number, because the mean of its divisors is an integer number (31011696).

Almost surely, 2^117155279 is an apocalyptic number.

117155279 is a deficient number, since it is larger than the sum of its proper divisors (6891505).

117155279 is an equidigital number, since it uses as much as digits as its factorization.

117155279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891504.

The product of its digits is 22050, while the sum is 38.

The square root of 117155279 is about 10823.8292207518. The cubic root of 117155279 is about 489.3136009193.

The spelling of 117155279 in words is "one hundred seventeen million, one hundred fifty-five thousand, two hundred seventy-nine".