1563983 has 8 divisors (see below), whose sum is σ = 1667952. Its totient is φ = 1461376.

The previous prime is 1563973. The next prime is 1564001. The reversal of 1563983 is 3893651.

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 1563983 - 2⁴ = 1563967 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 (1563943) 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, 3116 + ... + 3582.

It is an arithmetic number, because the mean of its divisors is an integer number (208494).

2^1563983 is an apocalyptic number.

1563983 is a deficient number, since it is larger than the sum of its proper divisors (103969).

1563983 is a wasteful number, since it uses less digits than its factorization.

1563983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681.

The product of its digits is 19440, while the sum is 35.

The square root of 1563983 is about 1250.5930593123. The cubic root of 1563983 is about 116.0764211051.

The spelling of 1563983 in words is "one million, five hundred sixty-three thousand, nine hundred eighty-three".