116581613 has 2 divisors, whose sum is σ = 116581614. Its totient is φ = 116581612.

The previous prime is 116581603. The next prime is 116581627. The reversal of 116581613 is 316185611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77668969 + 38912644 = 8813^2 + 6238^2 .

It is a cyclic number.

It is not a de Polignac number, because 116581613 - 2⁸ = 116581357 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 116581613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116581603) 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 as a sum of consecutive naturals, namely, 58290806 + 58290807.

It is an arithmetic number, because the mean of its divisors is an integer number (58290807).

Almost surely, 2^116581613 is an apocalyptic number.

It is an amenable number.

116581613 is a deficient number, since it is larger than the sum of its proper divisors (1).

116581613 is an equidigital number, since it uses as much as digits as its factorization.

116581613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 32.

The square root of 116581613 is about 10797.2965597875. The cubic root of 116581613 is about 488.5136312991.

The spelling of 116581613 in words is "one hundred sixteen million, five hundred eighty-one thousand, six hundred thirteen".