82257823 has 4 divisors (see below), whose sum is σ = 82391760. Its totient is φ = 82123888.

The previous prime is 82257809. The next prime is 82257841. The reversal of 82257823 is 32875228.

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-82257823 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 (82257853) 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 3 ways as a sum of consecutive naturals, for example, 66043 + ... + 67276.

It is an arithmetic number, because the mean of its divisors is an integer number (20597940).

Almost surely, 2^82257823 is an apocalyptic number.

82257823 is a deficient number, since it is larger than the sum of its proper divisors (133937).

82257823 is a wasteful number, since it uses less digits than its factorization.

82257823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133936.

The product of its digits is 53760, while the sum is 37.

The square root of 82257823 is about 9069.6098593049. The cubic root of 82257823 is about 434.9030003475.

The spelling of 82257823 in words is "eighty-two million, two hundred fifty-seven thousand, eight hundred twenty-three".