116812809 has 12 divisors (see below), whose sum is σ = 169766896. Its totient is φ = 77396472.

The previous prime is 116812799. The next prime is 116812819. The reversal of 116812809 is 908218611.

It is an interprime number because it is at equal distance from previous prime (116812799) and next prime (116812819).

It is not a de Polignac number, because 116812809 - 2⁵ = 116812777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116812819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38347 + ... + 41280.

Almost surely, 2^116812809 is an apocalyptic number.

It is an amenable number.

116812809 is a deficient number, since it is larger than the sum of its proper divisors (52954087).

116812809 is a wasteful number, since it uses less digits than its factorization.

116812809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79796 (or 79793 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 116812809 is about 10807.9974555882. The cubic root of 116812809 is about 488.8363460539.

The spelling of 116812809 in words is "one hundred sixteen million, eight hundred twelve thousand, eight hundred nine".