82745047 has 16 divisors (see below), whose sum is σ = 103364352. Its totient is φ = 64350720.

The previous prime is 82745023. The next prime is 82745059. The reversal of 82745047 is 74054728.

It is not a de Polignac number, because 82745047 - 2¹⁹ = 82220759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82744997 and 82745015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82745017) 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 15 ways as a sum of consecutive naturals, for example, 67383 + ... + 68599.

It is an arithmetic number, because the mean of its divisors is an integer number (6460272).

Almost surely, 2^82745047 is an apocalyptic number.

82745047 is a deficient number, since it is larger than the sum of its proper divisors (20619305).

82745047 is a wasteful number, since it uses less digits than its factorization.

82745047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 82745047 is about 9096.4304537549. The cubic root of 82745047 is about 435.7599733052.

The spelling of 82745047 in words is "eighty-two million, seven hundred forty-five thousand, forty-seven".