618659 has 4 divisors (see below), whose sum is σ = 651240. Its totient is φ = 586080.

The previous prime is 618643. The next prime is 618671. The reversal of 618659 is 956816.

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 618659 - 2⁴ = 618643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618619) 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, 16262 + ... + 16299.

It is an arithmetic number, because the mean of its divisors is an integer number (162810).

2⁶¹⁸⁶⁵⁹ is an apocalyptic number.

618659 is a deficient number, since it is larger than the sum of its proper divisors (32581).

618659 is a wasteful number, since it uses less digits than its factorization.

618659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32580.

The product of its digits is 12960, while the sum is 35.

The square root of 618659 is about 786.5487906036. The cubic root of 618659 is about 85.2086684003.

The spelling of 618659 in words is "six hundred eighteen thousand, six hundred fifty-nine".