79643 has 4 divisors (see below), whose sum is σ = 80808. Its totient is φ = 78480.

The previous prime is 79633. The next prime is 79657. The reversal of 79643 is 34697.

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 79643 - 2⁴ = 79627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79613) 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, 473 + ... + 618.

It is an arithmetic number, because the mean of its divisors is an integer number (20202).

2⁷⁹⁶⁴³ is an apocalyptic number.

79643 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

79643 is a deficient number, since it is larger than the sum of its proper divisors (1165).

79643 is a wasteful number, since it uses less digits than its factorization.

79643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164.

The product of its digits is 4536, while the sum is 29.

The square root of 79643 is about 282.2109140342. The cubic root of 79643 is about 43.0245037911.

The spelling of 79643 in words is "seventy-nine thousand, six hundred forty-three".