82549009 has 2 divisors, whose sum is σ = 82549010. Its totient is φ = 82549008.

The previous prime is 82548997. The next prime is 82549067. The reversal of 82549009 is 90094528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52243984 + 30305025 = 7228^2 + 5505^2 .

It is a cyclic number.

It is not a de Polignac number, because 82549009 - 2⁷ = 82548881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82549069) 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, 41274504 + 41274505.

It is an arithmetic number, because the mean of its divisors is an integer number (41274505).

Almost surely, 2^82549009 is an apocalyptic number.

It is an amenable number.

82549009 is a deficient number, since it is larger than the sum of its proper divisors (1).

82549009 is an equidigital number, since it uses as much as digits as its factorization.

82549009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 82549009 is about 9085.6485184053. The cubic root of 82549009 is about 435.4155697486.

The spelling of 82549009 in words is "eighty-two million, five hundred forty-nine thousand, nine".