74643 has 8 divisors (see below), whose sum is σ = 100800. Its totient is φ = 49128.

The previous prime is 74623. The next prime is 74653. The reversal of 74643 is 34647.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74643 - 2⁵ = 74611 is a prime.

74643 is a lucky number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (74623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (12600).

2⁷⁴⁶⁴³ is an apocalyptic number.

74643 is a deficient number, since it is larger than the sum of its proper divisors (26157).

74643 is a wasteful number, since it uses less digits than its factorization.

74643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321.

The product of its digits is 2016, while the sum is 24.

The square root of 74643 is about 273.2087114277. The cubic root of 74643 is about 42.1046144911.

Subtracting from 74643 its product of digits (2016), we obtain a palindrome (72627).

It can be divided in two parts, 74 and 643, that added together give a palindrome (717).

The spelling of 74643 in words is "seventy-four thousand, six hundred forty-three".