116991823 has 16 divisors (see below), whose sum is σ = 131947200. Its totient is φ = 102921984.

The previous prime is 116991779. The next prime is 116991827. The reversal of 116991823 is 328199611.

It is a cyclic number.

It is not a de Polignac number, because 116991823 - 2⁹ = 116991311 is a prime.

It is a Duffinian number.

Its product of digits (23328) is a multiple of the sum of its prime divisors (1458).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116991827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111003 + ... + 112051.

It is an arithmetic number, because the mean of its divisors is an integer number (8246700).

Almost surely, 2^116991823 is an apocalyptic number.

116991823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

116991823 is a deficient number, since it is larger than the sum of its proper divisors (14955377).

116991823 is a wasteful number, since it uses less digits than its factorization.

116991823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458.

The product of its digits is 23328, while the sum is 40.

The square root of 116991823 is about 10816.2758378288. The cubic root of 116991823 is about 489.0859302292.

The spelling of 116991823 in words is "one hundred sixteen million, nine hundred ninety-one thousand, eight hundred twenty-three".