82530817 has 2 divisors, whose sum is σ = 82530818. Its totient is φ = 82530816.

The previous prime is 82530809. The next prime is 82530821. The reversal of 82530817 is 71803528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81884401 + 646416 = 9049^2 + 804^2 .

It is a cyclic number.

It is not a de Polignac number, because 82530817 - 2³ = 82530809 is a prime.

It is a super-2 number, since 2×82530817² = 13622671509374978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82530517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41265408 + 41265409.

It is an arithmetic number, because the mean of its divisors is an integer number (41265409).

Almost surely, 2^82530817 is an apocalyptic number.

It is an amenable number.

82530817 is a deficient number, since it is larger than the sum of its proper divisors (1).

82530817 is an equidigital number, since it uses as much as digits as its factorization.

82530817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 82530817 is about 9084.6473239196. The cubic root of 82530817 is about 435.3835820358.

The spelling of 82530817 in words is "eighty-two million, five hundred thirty thousand, eight hundred seventeen".