82816889 has 2 divisors, whose sum is σ = 82816890. Its totient is φ = 82816888.

The previous prime is 82816883. The next prime is 82816897. The reversal of 82816889 is 98861828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82810000 + 6889 = 9100^2 + 83^2 .

It is a cyclic number.

It is not a de Polignac number, because 82816889 - 2⁴ = 82816873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82816883) 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, 41408444 + 41408445.

It is an arithmetic number, because the mean of its divisors is an integer number (41408445).

Almost surely, 2^82816889 is an apocalyptic number.

It is an amenable number.

82816889 is a deficient number, since it is larger than the sum of its proper divisors (1).

82816889 is an equidigital number, since it uses as much as digits as its factorization.

82816889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 442368, while the sum is 50.

The square root of 82816889 is about 9100.3785086116. The cubic root of 82816889 is about 435.8860505881.

It can be divided in two parts, 8281 and 6889, that multiplied together give a square (57047809 = 7553²).

The spelling of 82816889 in words is "eighty-two million, eight hundred sixteen thousand, eight hundred eighty-nine".