82188317 has 2 divisors, whose sum is σ = 82188318. Its totient is φ = 82188316.

The previous prime is 82188311. The next prime is 82188331. The reversal of 82188317 is 71388128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49857721 + 32330596 = 7061^2 + 5686^2 .

It is a cyclic number.

It is not a de Polignac number, because 82188317 - 2⁸ = 82188061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82188311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41094158 + 41094159.

It is an arithmetic number, because the mean of its divisors is an integer number (41094159).

Almost surely, 2^82188317 is an apocalyptic number.

It is an amenable number.

82188317 is a deficient number, since it is larger than the sum of its proper divisors (1).

82188317 is an equidigital number, since it uses as much as digits as its factorization.

82188317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 38.

The square root of 82188317 is about 9065.7772419137. Note that the first 3 decimals coincide. The cubic root of 82188317 is about 434.7804714299.

The spelling of 82188317 in words is "eighty-two million, one hundred eighty-eight thousand, three hundred seventeen".