82217797 has 8 divisors (see below), whose sum is σ = 89862912. Its totient is φ = 74884800.

The previous prime is 82217747. The next prime is 82217803. The reversal of 82217797 is 79771228.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82217797 is a prime.

It is a super-2 number, since 2×82217797² = 13519532287066418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82217747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77479 + ... + 78532.

It is an arithmetic number, because the mean of its divisors is an integer number (11232864).

Almost surely, 2^82217797 is an apocalyptic number.

It is an amenable number.

82217797 is a deficient number, since it is larger than the sum of its proper divisors (7645115).

82217797 is a wasteful number, since it uses less digits than its factorization.

82217797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156059.

The product of its digits is 98784, while the sum is 43.

The square root of 82217797 is about 9067.4029909341. The cubic root of 82217797 is about 434.8324487936.

The spelling of 82217797 in words is "eighty-two million, two hundred seventeen thousand, seven hundred ninety-seven".