505840543 has 4 divisors (see below), whose sum is σ = 544751368. Its totient is φ = 466929720.

The previous prime is 505840529. The next prime is 505840549. The reversal of 505840543 is 345048505.

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 505840543 - 2¹³ = 505832351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505840499 and 505840508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505840549) 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, 19455393 + ... + 19455418.

It is an arithmetic number, because the mean of its divisors is an integer number (136187842).

Almost surely, 2^505840543 is an apocalyptic number.

505840543 is a deficient number, since it is larger than the sum of its proper divisors (38910825).

505840543 is a wasteful number, since it uses less digits than its factorization.

505840543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38910824.

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 505840543 is about 22490.8991149754. The cubic root of 505840543 is about 796.7789983193.

The spelling of 505840543 in words is "five hundred five million, eight hundred forty thousand, five hundred forty-three".