905563 has 4 divisors (see below), whose sum is σ = 907488. Its totient is φ = 903640.

The previous prime is 905551. The next prime is 905581. The reversal of 905563 is 365509.

It is a happy number.

905563 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 905563 - 2¹⁷ = 774491 is a prime.

It is an Ulam number.

It is a Duffinian number.

905563 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (905963) 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, 270 + ... + 1372.

It is an arithmetic number, because the mean of its divisors is an integer number (226872).

2⁹⁰⁵⁵⁶³ is an apocalyptic number.

905563 is a deficient number, since it is larger than the sum of its proper divisors (1925).

905563 is a wasteful number, since it uses less digits than its factorization.

905563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 905563 is about 951.6107397460. The cubic root of 905563 is about 96.7474565719.

The spelling of 905563 in words is "nine hundred five thousand, five hundred sixty-three".