505843 has 8 divisors (see below), whose sum is σ = 550368. Its totient is φ = 462144.

The previous prime is 505823. The next prime is 505867. The reversal of 505843 is 348505.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 505843 - 2⁵ = 505811 is a prime.

It is a super-4 number, since 4×505843⁴ (a number of 24 digits) contains 4444 as substring.

505843 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (505823) 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, 2055 + ... + 2287.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2⁵⁰⁵⁸⁴³ is an apocalyptic number.

505843 is a deficient number, since it is larger than the sum of its proper divisors (44525).

505843 is a wasteful number, since it uses less digits than its factorization.

505843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 505843 is about 711.2264055840. The cubic root of 505843 is about 79.6780288372.

The spelling of 505843 in words is "five hundred five thousand, eight hundred forty-three".