82506439 has 4 divisors (see below), whose sum is σ = 83156224. Its totient is φ = 81856656.

The previous prime is 82506433. The next prime is 82506449. The reversal of 82506439 is 93460528.

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

It is a cyclic number.

It is not a de Polignac number, because 82506439 - 2¹⁷ = 82375367 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82506398 and 82506407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82506433) 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, 324702 + ... + 324955.

It is an arithmetic number, because the mean of its divisors is an integer number (20789056).

It is a Poulet number, since it divides 2^82506438-1.

Almost surely, 2^82506439 is an apocalyptic number.

82506439 is a deficient number, since it is larger than the sum of its proper divisors (649785).

82506439 is a wasteful number, since it uses less digits than its factorization.

82506439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649784.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 82506439 is about 9083.3055106608. The cubic root of 82506439 is about 435.3407098637.

It can be divided in two parts, 82 and 506439, that added together give a triangular number (506521 = T₁₀₀₆).

The spelling of 82506439 in words is "eighty-two million, five hundred six thousand, four hundred thirty-nine".