82195717 has 2 divisors, whose sum is σ = 82195718. Its totient is φ = 82195716.

The previous prime is 82195709. The next prime is 82195741. The reversal of 82195717 is 71759128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60980481 + 21215236 = 7809^2 + 4606^2 .

It is a cyclic number.

It is not a de Polignac number, because 82195717 - 2³ = 82195709 is a prime.

It is a super-2 number, since 2×82195717² = 13512271786288178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82195717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82195117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41097858 + 41097859.

It is an arithmetic number, because the mean of its divisors is an integer number (41097859).

Almost surely, 2^82195717 is an apocalyptic number.

It is an amenable number.

82195717 is a deficient number, since it is larger than the sum of its proper divisors (1).

82195717 is an equidigital number, since it uses as much as digits as its factorization.

82195717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 40.

The square root of 82195717 is about 9066.1853609994. The cubic root of 82195717 is about 434.7935198333.

The spelling of 82195717 in words is "eighty-two million, one hundred ninety-five thousand, seven hundred seventeen".