613857 has 8 divisors (see below), whose sum is σ = 829984. Its totient is φ = 403488.

The previous prime is 613849. The next prime is 613861. The reversal of 613857 is 758316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 613857 - 2³ = 613849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613807) 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 7 ways as a sum of consecutive naturals, for example, 1183 + ... + 1620.

It is an arithmetic number, because the mean of its divisors is an integer number (103748).

2⁶¹³⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

613857 is a deficient number, since it is larger than the sum of its proper divisors (216127).

613857 is a wasteful number, since it uses less digits than its factorization.

613857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879.

The product of its digits is 5040, while the sum is 30.

The square root of 613857 is about 783.4902679676. The cubic root of 613857 is about 84.9876337258.

It can be divided in two parts, 6138 and 57, that multiplied together give a triangular number (349866 = T₈₃₆).

The spelling of 613857 in words is "six hundred thirteen thousand, eight hundred fifty-seven".