618559 has 2 divisors, whose sum is σ = 618560. Its totient is φ = 618558.

The previous prime is 618547. The next prime is 618571. The reversal of 618559 is 955816.

It is a balanced prime because it is at equal distance from previous prime (618547) and next prime (618571).

It is a cyclic number.

It is not a de Polignac number, because 618559 - 2¹⁵ = 585791 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618509) 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 as a sum of consecutive naturals, namely, 309279 + 309280.

It is an arithmetic number, because the mean of its divisors is an integer number (309280).

2⁶¹⁸⁵⁵⁹ is an apocalyptic number.

618559 is a deficient number, since it is larger than the sum of its proper divisors (1).

618559 is an equidigital number, since it uses as much as digits as its factorization.

618559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 618559 is about 786.4852191872. The cubic root of 618559 is about 85.2040771117.

The spelling of 618559 in words is "six hundred eighteen thousand, five hundred fifty-nine".