82449817 has 2 divisors, whose sum is σ = 82449818. Its totient is φ = 82449816.

The previous prime is 82449743. The next prime is 82449823. The reversal of 82449817 is 71894428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43811161 + 38638656 = 6619^2 + 6216^2 .

It is a cyclic number.

It is not a de Polignac number, because 82449817 - 2²³ = 74061209 is a prime.

It is not a weakly prime, because it can be changed into another prime (82449827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41224908 + 41224909.

It is an arithmetic number, because the mean of its divisors is an integer number (41224909).

Almost surely, 2^82449817 is an apocalyptic number.

It is an amenable number.

82449817 is a deficient number, since it is larger than the sum of its proper divisors (1).

82449817 is an equidigital number, since it uses as much as digits as its factorization.

82449817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 82449817 is about 9080.1881588434. The cubic root of 82449817 is about 435.2410994455.

The spelling of 82449817 in words is "eighty-two million, four hundred forty-nine thousand, eight hundred seventeen".