116207989 has 4 divisors (see below), whose sum is σ = 118113100. Its totient is φ = 114302880.

The previous prime is 116207977. The next prime is 116208011. The reversal of 116207989 is 989702611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989702611 = 337 ⋅2936803.

It can be written as a sum of positive squares in 2 ways, for example, as 19873764 + 96334225 = 4458^2 + 9815^2 .

It is a cyclic number.

It is not a de Polignac number, because 116207989 - 2¹¹ = 116205941 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 (116207929) 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, 952464 + ... + 952585.

It is an arithmetic number, because the mean of its divisors is an integer number (29528275).

Almost surely, 2^116207989 is an apocalyptic number.

It is an amenable number.

116207989 is a deficient number, since it is larger than the sum of its proper divisors (1905111).

116207989 is an equidigital number, since it uses as much as digits as its factorization.

116207989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905110.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 116207989 is about 10779.9809369034. The cubic root of 116207989 is about 487.9912054426.

The spelling of 116207989 in words is "one hundred sixteen million, two hundred seven thousand, nine hundred eighty-nine".