116381999 has 4 divisors (see below), whose sum is σ = 116408136. Its totient is φ = 116355864.

The previous prime is 116381989. The next prime is 116382023. The reversal of 116381999 is 999183611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999183611 = 1433 ⋅697267.

It is a cyclic number.

It is not a de Polignac number, because 116381999 - 2⁸ = 116381743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116381989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4529 + ... + 15914.

It is an arithmetic number, because the mean of its divisors is an integer number (29102034).

Almost surely, 2^116381999 is an apocalyptic number.

116381999 is a deficient number, since it is larger than the sum of its proper divisors (26137).

116381999 is an equidigital number, since it uses as much as digits as its factorization.

116381999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26136.

The product of its digits is 104976, while the sum is 47.

The square root of 116381999 is about 10788.0488968117. The cubic root of 116381999 is about 488.2346568653.

The spelling of 116381999 in words is "one hundred sixteen million, three hundred eighty-one thousand, nine hundred ninety-nine".