82149817 has 2 divisors, whose sum is σ = 82149818. Its totient is φ = 82149816.

The previous prime is 82149811. The next prime is 82149827. The reversal of 82149817 is 71894128.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61136761 + 21013056 = 7819^2 + 4584^2 .

It is a cyclic number.

It is not a de Polignac number, because 82149817 - 2⁷ = 82149689 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82149817.

It is not a weakly prime, because it can be changed into another prime (82149811) 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, 41074908 + 41074909.

It is an arithmetic number, because the mean of its divisors is an integer number (41074909).

Almost surely, 2^82149817 is an apocalyptic number.

It is an amenable number.

82149817 is a deficient number, since it is larger than the sum of its proper divisors (1).

82149817 is an equidigital number, since it uses as much as digits as its factorization.

82149817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 40.

The square root of 82149817 is about 9063.6536231257. The cubic root of 82149817 is about 434.7125718258.

The spelling of 82149817 in words is "eighty-two million, one hundred forty-nine thousand, eight hundred seventeen".