618839 has 8 divisors (see below), whose sum is σ = 672672. Its totient is φ = 565920.

The previous prime is 618833. The next prime is 618841. The reversal of 618839 is 938816.

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

It is a cyclic number.

It is not a de Polignac number, because 618839 - 2⁴ = 618823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 618799 and 618808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618833) 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, 2222 + ... + 2484.

It is an arithmetic number, because the mean of its divisors is an integer number (84084).

2⁶¹⁸⁸³⁹ is an apocalyptic number.

618839 is a deficient number, since it is larger than the sum of its proper divisors (53833).

618839 is a wasteful number, since it uses less digits than its factorization.

618839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457.

The product of its digits is 10368, while the sum is 35.

The square root of 618839 is about 786.6632062071. The cubic root of 618839 is about 85.2169314731.

The spelling of 618839 in words is "six hundred eighteen thousand, eight hundred thirty-nine".