82809697 has 2 divisors, whose sum is σ = 82809698. Its totient is φ = 82809696.

The previous prime is 82809689. The next prime is 82809721. The reversal of 82809697 is 79690828.

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., 54037201 + 28772496 = 7351^2 + 5364^2 .

It is a cyclic number.

It is not a de Polignac number, because 82809697 - 2³ = 82809689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82809697.

It is not a weakly prime, because it can be changed into another prime (82809647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41404848 + 41404849.

It is an arithmetic number, because the mean of its divisors is an integer number (41404849).

Almost surely, 2^82809697 is an apocalyptic number.

It is an amenable number.

82809697 is a deficient number, since it is larger than the sum of its proper divisors (1).

82809697 is an equidigital number, since it uses as much as digits as its factorization.

82809697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 82809697 is about 9099.9833516331. The cubic root of 82809697 is about 435.8734324565.

The spelling of 82809697 in words is "eighty-two million, eight hundred nine thousand, six hundred ninety-seven".