613565 has 12 divisors (see below), whose sum is σ = 765012. Its totient is φ = 472320.

The previous prime is 613559. The next prime is 613573. The reversal of 613565 is 565316.

It can be written as a sum of positive squares in 6 ways, for example, as 196249 + 417316 = 443^2 + 646^2 .

It is not a de Polignac number, because 613565 - 2⁴ = 613549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8369 + ... + 8441.

It is an arithmetic number, because the mean of its divisors is an integer number (63751).

2⁶¹³⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

613565 is a deficient number, since it is larger than the sum of its proper divisors (151447).

613565 is an equidigital number, since it uses as much as digits as its factorization.

613565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 119 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 613565 is about 783.3039001563. The cubic root of 613565 is about 84.9741559261.

The spelling of 613565 in words is "six hundred thirteen thousand, five hundred sixty-five".