117891983 has 8 divisors (see below), whose sum is σ = 129018960. Its totient is φ = 106833280.

The previous prime is 117891919. The next prime is 117892001. The reversal of 117891983 is 389198711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117891983 - 2⁶ = 117891919 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 (117891913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13418 + ... + 20391.

It is an arithmetic number, because the mean of its divisors is an integer number (16127370).

Almost surely, 2^117891983 is an apocalyptic number.

117891983 is a deficient number, since it is larger than the sum of its proper divisors (11126977).

117891983 is a wasteful number, since it uses less digits than its factorization.

117891983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34137.

The product of its digits is 108864, while the sum is 47.

The square root of 117891983 is about 10857.8074674402. The cubic root of 117891983 is about 490.3371038628.

The spelling of 117891983 in words is "one hundred seventeen million, eight hundred ninety-one thousand, nine hundred eighty-three".