403983 has 6 divisors (see below), whose sum is σ = 583544. Its totient is φ = 269316.

The previous prime is 403981. The next prime is 403993. The reversal of 403983 is 389304.

It is not a de Polignac number, because 403983 - 2¹ = 403981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22435 + ... + 22452.

2⁴⁰³⁹⁸³ is an apocalyptic number.

403983 is a deficient number, since it is larger than the sum of its proper divisors (179561).

403983 is a wasteful number, since it uses less digits than its factorization.

403983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44893 (or 44890 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 403983 is about 635.5965701607. The cubic root of 403983 is about 73.9243809949.

It can be divided in two parts, 40398 and 3, that added together give a square (40401 = 201²).

The spelling of 403983 in words is "four hundred three thousand, nine hundred eighty-three".