505636983 has 12 divisors (see below), whose sum is σ = 732276480. Its totient is φ = 336211188.

The previous prime is 505636927. The next prime is 505637017. The reversal of 505636983 is 389636505.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

505636983 is a `hidden beast` number, since 5 + 0 + 5 + 636 + 9 + 8 + 3 = 666.

It is not a de Polignac number, because 505636983 - 2⁸ = 505636727 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505636283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1320010 + ... + 1320392.

It is an arithmetic number, because the mean of its divisors is an integer number (61023040).

Almost surely, 2^505636983 is an apocalyptic number.

505636983 is a deficient number, since it is larger than the sum of its proper divisors (226639497).

505636983 is an frugal number, since it uses more digits than its factorization.

505636983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The square root of 505636983 is about 22486.3732736073. The cubic root of 505636983 is about 796.6721042289.

The spelling of 505636983 in words is "five hundred five million, six hundred thirty-six thousand, nine hundred eighty-three".