618389 has 4 divisors (see below), whose sum is σ = 620160. Its totient is φ = 616620.

The previous prime is 618377. The next prime is 618407. The reversal of 618389 is 983816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 618389 - 2¹² = 614293 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 618389.

It is not an unprimeable number, because it can be changed into a prime (618329) 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, 167 + ... + 1124.

It is an arithmetic number, because the mean of its divisors is an integer number (155040).

2⁶¹⁸³⁸⁹ is an apocalyptic number.

It is an amenable number.

618389 is a deficient number, since it is larger than the sum of its proper divisors (1771).

618389 is a wasteful number, since it uses less digits than its factorization.

618389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770.

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

The square root of 618389 is about 786.3771359850. The cubic root of 618389 is about 85.1962707854.

The spelling of 618389 in words is "six hundred eighteen thousand, three hundred eighty-nine".