71943 has 4 divisors (see below), whose sum is σ = 95928. Its totient is φ = 47960.

The previous prime is 71941. The next prime is 71947. The reversal of 71943 is 34917.

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 71943 - 2¹ = 71941 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11988 + ... + 11993.

It is an arithmetic number, because the mean of its divisors is an integer number (23982).

2⁷¹⁹⁴³ is an apocalyptic number.

71943 is a deficient number, since it is larger than the sum of its proper divisors (23985).

71943 is a wasteful number, since it uses less digits than its factorization.

71943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23984.

The product of its digits is 756, while the sum is 24.

The square root of 71943 is about 268.2219230414. The cubic root of 71943 is about 41.5906953426.

The spelling of 71943 in words is "seventy-one thousand, nine hundred forty-three".