82785589 has 2 divisors, whose sum is σ = 82785590. Its totient is φ = 82785588.

The previous prime is 82785587. The next prime is 82785643. The reversal of 82785589 is 98558728.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82719025 + 66564 = 9095^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 82785589 - 2¹ = 82785587 is a prime.

Together with 82785587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82785587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41392794 + 41392795.

It is an arithmetic number, because the mean of its divisors is an integer number (41392795).

Almost surely, 2^82785589 is an apocalyptic number.

It is an amenable number.

82785589 is a deficient number, since it is larger than the sum of its proper divisors (1).

82785589 is an equidigital number, since it uses as much as digits as its factorization.

82785589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 52.

The square root of 82785589 is about 9098.6586374036. The cubic root of 82785589 is about 435.8311304195.

The spelling of 82785589 in words is "eighty-two million, seven hundred eighty-five thousand, five hundred eighty-nine".