82604681 has 4 divisors (see below), whose sum is σ = 82717200. Its totient is φ = 82492164.

The previous prime is 82604663. The next prime is 82604689. The reversal of 82604681 is 18640628.

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 82604681 - 2⁶ = 82604617 is a prime.

It is a super-2 number, since 2×82604681² = 13647066646223522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82604689) 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 3 ways as a sum of consecutive naturals, for example, 55151 + ... + 56628.

It is an arithmetic number, because the mean of its divisors is an integer number (20679300).

Almost surely, 2^82604681 is an apocalyptic number.

It is an amenable number.

82604681 is a deficient number, since it is larger than the sum of its proper divisors (112519).

82604681 is a wasteful number, since it uses less digits than its factorization.

82604681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112518.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 82604681 is about 9088.7117348940. The cubic root of 82604681 is about 435.5134308398.

The spelling of 82604681 in words is "eighty-two million, six hundred four thousand, six hundred eighty-one".