116991801 has 6 divisors (see below), whose sum is σ = 168988170. Its totient is φ = 77994528.

The previous prime is 116991779. The next prime is 116991827. The reversal of 116991801 is 108199611.

It can be written as a sum of positive squares in only one way, i.e., 61638201 + 55353600 = 7851^2 + 7440^2 .

It is a de Polignac number, because none of the positive numbers 2^k-116991801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (116991851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6499536 + ... + 6499553.

It is an arithmetic number, because the mean of its divisors is an integer number (28164695).

Almost surely, 2^116991801 is an apocalyptic number.

It is an amenable number.

116991801 is a deficient number, since it is larger than the sum of its proper divisors (51996369).

116991801 is a wasteful number, since it uses less digits than its factorization.

116991801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12999095 (or 12999092 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 36.

The square root of 116991801 is about 10816.2748208429. The cubic root of 116991801 is about 489.0858995721.

The spelling of 116991801 in words is "one hundred sixteen million, nine hundred ninety-one thousand, eight hundred one".