116989 has 2 divisors, whose sum is σ = 116990. Its totient is φ = 116988.

The previous prime is 116981. The next prime is 116993. The reversal of 116989 is 989611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116964 + 25 = 342^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 116989 - 2³ = 116981 is a prime.

It is a super-2 number, since 2×116989² = 27372852242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58494 + 58495.

It is an arithmetic number, because the mean of its divisors is an integer number (58495).

2¹¹⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

116989 is a deficient number, since it is larger than the sum of its proper divisors (1).

116989 is an equidigital number, since it uses as much as digits as its factorization.

116989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 34.

The square root of 116989 is about 342.0365477548. The cubic root of 116989 is about 48.9081996334.

The spelling of 116989 in words is "one hundred sixteen thousand, nine hundred eighty-nine".