117983851 has 4 divisors (see below), whose sum is σ = 119744872. Its totient is φ = 116222832.

The previous prime is 117983849. The next prime is 117983867. The reversal of 117983851 is 158389711.

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

It is a cyclic number.

It is not a de Polignac number, because 117983851 - 2¹ = 117983849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117983798 and 117983807.

It is not an unprimeable number, because it can be changed into a prime (117983881) 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, 880410 + ... + 880543.

It is an arithmetic number, because the mean of its divisors is an integer number (29936218).

Almost surely, 2^117983851 is an apocalyptic number.

117983851 is a deficient number, since it is larger than the sum of its proper divisors (1761021).

117983851 is an equidigital number, since it uses as much as digits as its factorization.

117983851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761020.

The product of its digits is 60480, while the sum is 43.

The square root of 117983851 is about 10862.0371477914. The cubic root of 117983851 is about 490.4644367882.

The spelling of 117983851 in words is "one hundred seventeen million, nine hundred eighty-three thousand, eight hundred fifty-one".