82116589 has 2 divisors, whose sum is σ = 82116590. Its totient is φ = 82116588.

The previous prime is 82116581. The next prime is 82116641. The reversal of 82116589 is 98561128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74960964 + 7155625 = 8658^2 + 2675^2 .

It is a cyclic number.

It is not a de Polignac number, because 82116589 - 2³ = 82116581 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82116581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41058294 + 41058295.

It is an arithmetic number, because the mean of its divisors is an integer number (41058295).

Almost surely, 2^82116589 is an apocalyptic number.

It is an amenable number.

82116589 is a deficient number, since it is larger than the sum of its proper divisors (1).

82116589 is an equidigital number, since it uses as much as digits as its factorization.

82116589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 40.

The square root of 82116589 is about 9061.8204021046. The cubic root of 82116589 is about 434.6539530006.

The spelling of 82116589 in words is "eighty-two million, one hundred sixteen thousand, five hundred eighty-nine".