82808681 has 4 divisors (see below), whose sum is σ = 82879632. Its totient is φ = 82737732.

The previous prime is 82808653. The next prime is 82808711. The reversal of 82808681 is 18680828.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82808681 - 2⁶ = 82808617 is a prime.

It is a super-2 number, since 2×82808681² = 13714555297919522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82808641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33695 + ... + 36068.

It is an arithmetic number, because the mean of its divisors is an integer number (20719908).

Almost surely, 2^82808681 is an apocalyptic number.

It is an amenable number.

82808681 is a deficient number, since it is larger than the sum of its proper divisors (70951).

82808681 is a wasteful number, since it uses less digits than its factorization.

82808681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70950.

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 82808681 is about 9099.9275271839. The cubic root of 82808681 is about 435.8716498584.

It can be divided in two parts, 8280 and 8681, that added together give a palindrome (16961).

The spelling of 82808681 in words is "eighty-two million, eight hundred eight thousand, six hundred eighty-one".