505983 has 8 divisors (see below), whose sum is σ = 678528. Its totient is φ = 335384.

The previous prime is 505979. The next prime is 506047. The reversal of 505983 is 389505.

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 505983 - 2² = 505979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505283) 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, 310 + ... + 1052.

It is an arithmetic number, because the mean of its divisors is an integer number (84816).

2⁵⁰⁵⁹⁸³ is an apocalyptic number.

505983 is a deficient number, since it is larger than the sum of its proper divisors (172545).

505983 is a wasteful number, since it uses less digits than its factorization.

505983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 505983 is about 711.3248203177. The cubic root of 505983 is about 79.6853788747.

The spelling of 505983 in words is "five hundred five thousand, nine hundred eighty-three".