613863 has 6 divisors (see below), whose sum is σ = 886704. Its totient is φ = 409236.

The previous prime is 613861. The next prime is 613883. The reversal of 613863 is 368316.

It is not a de Polignac number, because 613863 - 2¹ = 613861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34095 + ... + 34112.

It is an arithmetic number, because the mean of its divisors is an integer number (147784).

2⁶¹³⁸⁶³ is an apocalyptic number.

613863 is a deficient number, since it is larger than the sum of its proper divisors (272841).

613863 is a wasteful number, since it uses less digits than its factorization.

613863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68213 (or 68210 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 613863 is about 783.4940969784. The cubic root of 613863 is about 84.9879106220.

The spelling of 613863 in words is "six hundred thirteen thousand, eight hundred sixty-three".