82684861 has 4 divisors (see below), whose sum is σ = 94496992. Its totient is φ = 70872732.

The previous prime is 82684859. The next prime is 82684871. The reversal of 82684861 is 16848628.

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 not a de Polignac number, because 82684861 - 2¹ = 82684859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82684871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5906055 + ... + 5906068.

It is an arithmetic number, because the mean of its divisors is an integer number (23624248).

Almost surely, 2^82684861 is an apocalyptic number.

It is an amenable number.

82684861 is a deficient number, since it is larger than the sum of its proper divisors (11812131).

82684861 is a wasteful number, since it uses less digits than its factorization.

82684861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11812130.

The product of its digits is 147456, while the sum is 43.

The square root of 82684861 is about 9093.1216312111. The cubic root of 82684861 is about 435.6542952331.

The spelling of 82684861 in words is "eighty-two million, six hundred eighty-four thousand, eight hundred sixty-one".