82806173 has 2 divisors, whose sum is σ = 82806174. Its totient is φ = 82806172.

The previous prime is 82806169. The next prime is 82806181. The reversal of 82806173 is 37160828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44328964 + 38477209 = 6658^2 + 6203^2 .

It is a cyclic number.

It is not a de Polignac number, because 82806173 - 2² = 82806169 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82803173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41403086 + 41403087.

It is an arithmetic number, because the mean of its divisors is an integer number (41403087).

Almost surely, 2^82806173 is an apocalyptic number.

It is an amenable number.

82806173 is a deficient number, since it is larger than the sum of its proper divisors (1).

82806173 is an equidigital number, since it uses as much as digits as its factorization.

82806173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 82806173 is about 9099.7897228452. The cubic root of 82806173 is about 435.8672494456.

The spelling of 82806173 in words is "eighty-two million, eight hundred six thousand, one hundred seventy-three".