116565109 has 2 divisors, whose sum is σ = 116565110. Its totient is φ = 116565108.

The previous prime is 116565101. The next prime is 116565139. The reversal of 116565109 is 901565611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76912900 + 39652209 = 8770^2 + 6297^2 .

It is a cyclic number.

It is not a de Polignac number, because 116565109 - 2³ = 116565101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116565101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58282554 + 58282555.

It is an arithmetic number, because the mean of its divisors is an integer number (58282555).

Almost surely, 2^116565109 is an apocalyptic number.

It is an amenable number.

116565109 is a deficient number, since it is larger than the sum of its proper divisors (1).

116565109 is an equidigital number, since it uses as much as digits as its factorization.

116565109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 116565109 is about 10796.5322673533. The cubic root of 116565109 is about 488.4905778939.

The spelling of 116565109 in words is "one hundred sixteen million, five hundred sixty-five thousand, one hundred nine".