116391811 has 4 divisors (see below), whose sum is σ = 116641512. Its totient is φ = 116142112.

The previous prime is 116391773. The next prime is 116391829. The reversal of 116391811 is 118193611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118193611 = 41 ⋅2882771.

It is a cyclic number.

It is not a de Polignac number, because 116391811 - 2⁷ = 116391683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116391211) 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, 124150 + ... + 125083.

It is an arithmetic number, because the mean of its divisors is an integer number (29160378).

Almost surely, 2^116391811 is an apocalyptic number.

116391811 is a deficient number, since it is larger than the sum of its proper divisors (249701).

116391811 is an equidigital number, since it uses as much as digits as its factorization.

116391811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249700.

The product of its digits is 1296, while the sum is 31.

The square root of 116391811 is about 10788.5036497190. The cubic root of 116391811 is about 488.2483772685.

The spelling of 116391811 in words is "one hundred sixteen million, three hundred ninety-one thousand, eight hundred eleven".