82680173 has 2 divisors, whose sum is σ = 82680174. Its totient is φ = 82680172.

The previous prime is 82680127. The next prime is 82680187. The reversal of 82680173 is 37108628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81396484 + 1283689 = 9022^2 + 1133^2 .

It is a cyclic number.

It is not a de Polignac number, because 82680173 - 2²⁰ = 81631597 is a prime.

It is a super-2 number, since 2×82680173² = 13672022014619858, which contains 22 as substring.

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 (82680113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41340086 + 41340087.

It is an arithmetic number, because the mean of its divisors is an integer number (41340087).

Almost surely, 2^82680173 is an apocalyptic number.

It is an amenable number.

82680173 is a deficient number, since it is larger than the sum of its proper divisors (1).

82680173 is an equidigital number, since it uses as much as digits as its factorization.

82680173 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 82680173 is about 9092.8638502949. The cubic root of 82680173 is about 435.6460616181.

The spelling of 82680173 in words is "eighty-two million, six hundred eighty thousand, one hundred seventy-three".