82190009171 has 2 divisors, whose sum is σ = 82190009172. Its totient is φ = 82190009170.

The previous prime is 82190009113. The next prime is 82190009197. The reversal of 82190009171 is 17190009128.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82190009171 is a prime.

It is not a weakly prime, because it can be changed into another prime (82190009071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41095004585 + 41095004586.

It is an arithmetic number, because the mean of its divisors is an integer number (41095004586).

Almost surely, 2^82190009171 is an apocalyptic number.

82190009171 is a deficient number, since it is larger than the sum of its proper divisors (1).

82190009171 is an equidigital number, since it uses as much as digits as its factorization.

82190009171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 38.

The spelling of 82190009171 in words is "eighty-two billion, one hundred ninety million, nine thousand, one hundred seventy-one".