617563 has 4 divisors (see below), whose sum is σ = 619240. Its totient is φ = 615888.

The previous prime is 617537. The next prime is 617579. The reversal of 617563 is 365716.

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 617563 - 2⁵ = 617531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18 + ... + 1111.

It is an arithmetic number, because the mean of its divisors is an integer number (154810).

2⁶¹⁷⁵⁶³ is an apocalyptic number.

617563 is a deficient number, since it is larger than the sum of its proper divisors (1677).

617563 is a wasteful number, since it uses less digits than its factorization.

617563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676.

The product of its digits is 3780, while the sum is 28.

The square root of 617563 is about 785.8517671928. The cubic root of 617563 is about 85.1583208457.

The spelling of 617563 in words is "six hundred seventeen thousand, five hundred sixty-three".