82209717 has 12 divisors (see below), whose sum is σ = 118915264. Its totient is φ = 54729000.

The previous prime is 82209709. The next prime is 82209719. The reversal of 82209717 is 71790228.

It is not a de Polignac number, because 82209717 - 2³ = 82209709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82209719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 678 + ... + 12840.

Almost surely, 2^82209717 is an apocalyptic number.

It is an amenable number.

82209717 is a deficient number, since it is larger than the sum of its proper divisors (36705547).

82209717 is a wasteful number, since it uses less digits than its factorization.

82209717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12920 (or 12917 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 82209717 is about 9066.9574279358. The cubic root of 82209717 is about 434.8182038596.

The spelling of 82209717 in words is "eighty-two million, two hundred nine thousand, seven hundred seventeen".