80643 has 4 divisors (see below), whose sum is σ = 107528. Its totient is φ = 53760.

The previous prime is 80629. The next prime is 80651. The reversal of 80643 is 34608.

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

It is not a de Polignac number, because 80643 - 2⁴ = 80627 is a prime.

It is a super-3 number, since 3×80643³ = 1573335280823121, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80603) 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, 13438 + ... + 13443.

It is an arithmetic number, because the mean of its divisors is an integer number (26882).

2⁸⁰⁶⁴³ is an apocalyptic number.

80643 is a deficient number, since it is larger than the sum of its proper divisors (26885).

80643 is a wasteful number, since it uses less digits than its factorization.

80643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26884.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 80643 is about 283.9771117537. The cubic root of 80643 is about 43.2038276787.

The spelling of 80643 in words is "eighty thousand, six hundred forty-three".