501943 has 4 divisors (see below), whose sum is σ = 540568. Its totient is φ = 463320.

The previous prime is 501931. The next prime is 501947. The reversal of 501943 is 349105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349105 = 5 ⋅69821.

It is not a de Polignac number, because 501943 - 2⁵ = 501911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501947) 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, 19293 + ... + 19318.

It is an arithmetic number, because the mean of its divisors is an integer number (135142).

2⁵⁰¹⁹⁴³ is an apocalyptic number.

501943 is a deficient number, since it is larger than the sum of its proper divisors (38625).

501943 is a wasteful number, since it uses less digits than its factorization.

501943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38624.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 501943 is about 708.4793574975. The cubic root of 501943 is about 79.4727303859.

It can be divided in two parts, 501 and 943, that added together give a square (1444 = 38²).

The spelling of 501943 in words is "five hundred one thousand, nine hundred forty-three".