82579681 has 8 divisors (see below), whose sum is σ = 87415200. Its totient is φ = 77793120.

The previous prime is 82579669. The next prime is 82579687. The reversal of 82579681 is 18697528.

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

It is a cyclic number.

It is not a de Polignac number, because 82579681 - 2¹¹ = 82577633 is a prime.

It is a super-2 number, since 2×82579681² = 13638807428123522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82579687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8740 + ... + 15541.

It is an arithmetic number, because the mean of its divisors is an integer number (10926900).

Almost surely, 2^82579681 is an apocalyptic number.

It is an amenable number.

82579681 is a deficient number, since it is larger than the sum of its proper divisors (4835519).

82579681 is a wasteful number, since it uses less digits than its factorization.

82579681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24479.

The product of its digits is 241920, while the sum is 46.

The square root of 82579681 is about 9087.3362983880. The cubic root of 82579681 is about 435.4694908992.

The spelling of 82579681 in words is "eighty-two million, five hundred seventy-nine thousand, six hundred eighty-one".