82112197 has 2 divisors, whose sum is σ = 82112198. Its totient is φ = 82112196.

The previous prime is 82112153. The next prime is 82112203. The reversal of 82112197 is 79121128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41139396 + 40972801 = 6414^2 + 6401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82112197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82112297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41056098 + 41056099.

It is an arithmetic number, because the mean of its divisors is an integer number (41056099).

Almost surely, 2^82112197 is an apocalyptic number.

It is an amenable number.

82112197 is a deficient number, since it is larger than the sum of its proper divisors (1).

82112197 is an equidigital number, since it uses as much as digits as its factorization.

82112197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 31.

The square root of 82112197 is about 9061.5780634501. The cubic root of 82112197 is about 434.6462037170.

The spelling of 82112197 in words is "eighty-two million, one hundred twelve thousand, one hundred ninety-seven".