116509791 has 16 divisors (see below), whose sum is σ = 161652960. Its totient is φ = 74551680.

The previous prime is 116509787. The next prime is 116509807. The reversal of 116509791 is 197905611.

It is not a de Polignac number, because 116509791 - 2² = 116509787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116509711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11181 + ... + 18921.

It is an arithmetic number, because the mean of its divisors is an integer number (10103310).

Almost surely, 2^116509791 is an apocalyptic number.

116509791 is a deficient number, since it is larger than the sum of its proper divisors (45143169).

116509791 is a wasteful number, since it uses less digits than its factorization.

116509791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7946.

The product of its (nonzero) digits is 17010, while the sum is 39.

The square root of 116509791 is about 10793.9701222488. The cubic root of 116509791 is about 488.4132917667.

The spelling of 116509791 in words is "one hundred sixteen million, five hundred nine thousand, seven hundred ninety-one".