82806517 has 2 divisors, whose sum is σ = 82806518. Its totient is φ = 82806516.

The previous prime is 82806497. The next prime is 82806523. The reversal of 82806517 is 71560828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78960996 + 3845521 = 8886^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 82806517 - 2²³ = 74417909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82806547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41403258 + 41403259.

It is an arithmetic number, because the mean of its divisors is an integer number (41403259).

Almost surely, 2^82806517 is an apocalyptic number.

It is an amenable number.

82806517 is a deficient number, since it is larger than the sum of its proper divisors (1).

82806517 is an equidigital number, since it uses as much as digits as its factorization.

82806517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 82806517 is about 9099.8086243613. The cubic root of 82806517 is about 435.8678530163.

The spelling of 82806517 in words is "eighty-two million, eight hundred six thousand, five hundred seventeen".