613871 has 4 divisors (see below), whose sum is σ = 646200. Its totient is φ = 581544.

The previous prime is 613861. The next prime is 613883. The reversal of 613871 is 178316.

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 613871 - 2⁶ = 613807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 613871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613841) 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, 16136 + ... + 16173.

It is an arithmetic number, because the mean of its divisors is an integer number (161550).

2⁶¹³⁸⁷¹ is an apocalyptic number.

613871 is a deficient number, since it is larger than the sum of its proper divisors (32329).

613871 is a wasteful number, since it uses less digits than its factorization.

613871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32328.

The product of its digits is 1008, while the sum is 26.

The square root of 613871 is about 783.4992022970. The cubic root of 613871 is about 84.9882798143.

The spelling of 613871 in words is "six hundred thirteen thousand, eight hundred seventy-one".