905983 has 4 divisors (see below), whose sum is σ = 975688. Its totient is φ = 836280.

The previous prime is 905963. The next prime is 905999. The reversal of 905983 is 389509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389509 = 127 ⋅3067.

It is a cyclic number.

It is not a de Polignac number, because 905983 - 2⁵ = 905951 is a prime.

It is a Duffinian number.

905983 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905923) 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, 34833 + ... + 34858.

It is an arithmetic number, because the mean of its divisors is an integer number (243922).

2⁹⁰⁵⁹⁸³ is an apocalyptic number.

905983 is a deficient number, since it is larger than the sum of its proper divisors (69705).

905983 is a wasteful number, since it uses less digits than its factorization.

905983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69704.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 905983 is about 951.8313926321. The cubic root of 905983 is about 96.7624114127.

It can be divided in two parts, 90598 and 3, that added together give a square (90601 = 301²).

The spelling of 905983 in words is "nine hundred five thousand, nine hundred eighty-three".