82197986 has 8 divisors (see below), whose sum is σ = 132781404. Its totient is φ = 37937520.

The previous prime is 82197967. The next prime is 82198001. The reversal of 82197986 is 68979128.

It can be written as a sum of positive squares in 2 ways, for example, as 81342361 + 855625 = 9019^2 + 925^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1580705 + ... + 1580756.

Almost surely, 2^82197986 is an apocalyptic number.

82197986 is a deficient number, since it is larger than the sum of its proper divisors (50583418).

82197986 is a wasteful number, since it uses less digits than its factorization.

82197986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161476.

The product of its digits is 435456, while the sum is 50.

The square root of 82197986 is about 9066.3104954551. The cubic root of 82197986 is about 434.7975205990.

The spelling of 82197986 in words is "eighty-two million, one hundred ninety-seven thousand, nine hundred eighty-six".