613563 has 4 divisors (see below), whose sum is σ = 818088. Its totient is φ = 409040.

The previous prime is 613559. The next prime is 613573. The reversal of 613563 is 365316.

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 613563 - 2² = 613559 is a prime.

It is a super-3 number, since 3×613563³ = 692944961776333641, which contains 333 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (613523) 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, 102258 + ... + 102263.

It is an arithmetic number, because the mean of its divisors is an integer number (204522).

2⁶¹³⁵⁶³ is an apocalyptic number.

613563 is a deficient number, since it is larger than the sum of its proper divisors (204525).

613563 is a wasteful number, since it uses less digits than its factorization.

613563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204524.

The product of its digits is 1620, while the sum is 24.

The square root of 613563 is about 783.3026235115. The cubic root of 613563 is about 84.9740635977.

Adding to 613563 its reverse (365316), we get a palindrome (978879).

It can be divided in two parts, 613 and 563, that added together give a triangular number (1176 = T₄₈).

The spelling of 613563 in words is "six hundred thirteen thousand, five hundred sixty-three".