82985839 has 2 divisors, whose sum is σ = 82985840. Its totient is φ = 82985838.

The previous prime is 82985831. The next prime is 82985867. The reversal of 82985839 is 93858928.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82985839 - 2³ = 82985831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82985831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41492919 + 41492920.

It is an arithmetic number, because the mean of its divisors is an integer number (41492920).

Almost surely, 2^82985839 is an apocalyptic number.

82985839 is a deficient number, since it is larger than the sum of its proper divisors (1).

82985839 is an equidigital number, since it uses as much as digits as its factorization.

82985839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 52.

The square root of 82985839 is about 9109.6563601488. The cubic root of 82985839 is about 436.1822579904.

It can be divided in two parts, 829 and 85839, that added together give a palindrome (86668).

The spelling of 82985839 in words is "eighty-two million, nine hundred eighty-five thousand, eight hundred thirty-nine".