82243643 has 4 divisors (see below), whose sum is σ = 82312440. Its totient is φ = 82174848.

The previous prime is 82243627. The next prime is 82243657. The reversal of 82243643 is 34634228.

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 82243643 - 2⁴ = 82243627 is a prime.

It is a super-2 number, since 2×82243643² = 13528033627822898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82243673) 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, 32573 + ... + 35006.

It is an arithmetic number, because the mean of its divisors is an integer number (20578110).

Almost surely, 2^82243643 is an apocalyptic number.

82243643 is a deficient number, since it is larger than the sum of its proper divisors (68797).

82243643 is a wasteful number, since it uses less digits than its factorization.

82243643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68796.

The product of its digits is 27648, while the sum is 32.

The square root of 82243643 is about 9068.8280940814. The cubic root of 82243643 is about 434.8780086862.

The spelling of 82243643 in words is "eighty-two million, two hundred forty-three thousand, six hundred forty-three".