82879385 has 4 divisors (see below), whose sum is σ = 99455268. Its totient is φ = 66303504.

The previous prime is 82879367. The next prime is 82879397. The reversal of 82879385 is 58397828.

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

It can be written as a sum of positive squares in 2 ways, for example, as 58859584 + 24019801 = 7672^2 + 4901^2 .

It is a cyclic number.

It is not a de Polignac number, because 82879385 - 2¹⁶ = 82813849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 8287934 + ... + 8287943.

It is an arithmetic number, because the mean of its divisors is an integer number (24863817).

Almost surely, 2^82879385 is an apocalyptic number.

It is an amenable number.

82879385 is a deficient number, since it is larger than the sum of its proper divisors (16575883).

82879385 is a wasteful number, since it uses less digits than its factorization.

82879385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16575882.

The product of its digits is 967680, while the sum is 50.

The square root of 82879385 is about 9103.8115643943. The cubic root of 82879385 is about 435.9956670585.

The spelling of 82879385 in words is "eighty-two million, eight hundred seventy-nine thousand, three hundred eighty-five".