116639809 has 8 divisors (see below), whose sum is σ = 137031552. Its totient is φ = 97879440.

The previous prime is 116639807. The next prime is 116639813. The reversal of 116639809 is 908936611.

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 116639809 - 2¹ = 116639807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116639807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407689 + ... + 407974.

It is an arithmetic number, because the mean of its divisors is an integer number (17128944).

Almost surely, 2^116639809 is an apocalyptic number.

It is an amenable number.

116639809 is a deficient number, since it is larger than the sum of its proper divisors (20391743).

116639809 is a wasteful number, since it uses less digits than its factorization.

116639809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815687.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 116639809 is about 10799.9911574038. The cubic root of 116639809 is about 488.5949042926.

The spelling of 116639809 in words is "one hundred sixteen million, six hundred thirty-nine thousand, eight hundred nine".