117823847 has 4 divisors (see below), whose sum is σ = 117853656. Its totient is φ = 117794040.

The previous prime is 117823819. The next prime is 117823859. The reversal of 117823847 is 748328711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117823847 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 (117823817) 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, 7868 + ... + 17249.

It is an arithmetic number, because the mean of its divisors is an integer number (29463414).

Almost surely, 2^117823847 is an apocalyptic number.

117823847 is a deficient number, since it is larger than the sum of its proper divisors (29809).

117823847 is an equidigital number, since it uses as much as digits as its factorization.

117823847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29808.

The product of its digits is 75264, while the sum is 41.

The square root of 117823847 is about 10854.6693639189. The cubic root of 117823847 is about 490.2426217600.

The spelling of 117823847 in words is "one hundred seventeen million, eight hundred twenty-three thousand, eight hundred forty-seven".