117853139 has 4 divisors (see below), whose sum is σ = 118232400. Its totient is φ = 117473880.

The previous prime is 117853123. The next prime is 117853199. The reversal of 117853139 is 931358711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931358711 = 23 ⋅40493857.

It is a cyclic number.

It is not a de Polignac number, because 117853139 - 2⁴ = 117853123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117853199) 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, 189164 + ... + 189785.

It is an arithmetic number, because the mean of its divisors is an integer number (29558100).

Almost surely, 2^117853139 is an apocalyptic number.

117853139 is a deficient number, since it is larger than the sum of its proper divisors (379261).

117853139 is an equidigital number, since it uses as much as digits as its factorization.

117853139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379260.

The product of its digits is 22680, while the sum is 38.

The square root of 117853139 is about 10856.0185611485. The cubic root of 117853139 is about 490.2832445410.

The spelling of 117853139 in words is "one hundred seventeen million, eight hundred fifty-three thousand, one hundred thirty-nine".