82784231 has 4 divisors (see below), whose sum is σ = 82843200. Its totient is φ = 82725264.

The previous prime is 82784213. The next prime is 82784279. The reversal of 82784231 is 13248728.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82784231 is a prime.

It is a super-2 number, since 2×82784231² = 13706457804522722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82784191 and 82784200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82744231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27326 + ... + 30203.

It is an arithmetic number, because the mean of its divisors is an integer number (20710800).

Almost surely, 2^82784231 is an apocalyptic number.

82784231 is a deficient number, since it is larger than the sum of its proper divisors (58969).

82784231 is a wasteful number, since it uses less digits than its factorization.

82784231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58968.

The product of its digits is 21504, while the sum is 35.

The square root of 82784231 is about 9098.5840107129. The cubic root of 82784231 is about 435.8287473078.

It can be divided in two parts, 827 and 84231, that added together give a palindrome (85058).

The spelling of 82784231 in words is "eighty-two million, seven hundred eighty-four thousand, two hundred thirty-one".