116718989 has 4 divisors (see below), whose sum is σ = 116837760. Its totient is φ = 116600220.

The previous prime is 116718983. The next prime is 116719003. The reversal of 116718989 is 989817611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 116718989 - 2⁸ = 116718733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116718983) 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, 57899 + ... + 59880.

It is an arithmetic number, because the mean of its divisors is an integer number (29209440).

Almost surely, 2^116718989 is an apocalyptic number.

It is an amenable number.

116718989 is a deficient number, since it is larger than the sum of its proper divisors (118771).

116718989 is an equidigital number, since it uses as much as digits as its factorization.

116718989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118770.

The product of its digits is 217728, while the sum is 50.

The square root of 116718989 is about 10803.6562792418. The cubic root of 116718989 is about 488.7054388635.

The spelling of 116718989 in words is "one hundred sixteen million, seven hundred eighteen thousand, nine hundred eighty-nine".