818959 has 2 divisors, whose sum is σ = 818960. Its totient is φ = 818958.

The previous prime is 818947. The next prime is 818963. The reversal of 818959 is 959818.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 818959 - 2¹¹ = 816911 is a prime.

It is a plaindrome in base 13.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409479 + 409480.

It is an arithmetic number, because the mean of its divisors is an integer number (409480).

2⁸¹⁸⁹⁵⁹ is an apocalyptic number.

818959 is a deficient number, since it is larger than the sum of its proper divisors (1).

818959 is an equidigital number, since it uses as much as digits as its factorization.

818959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 40.

The square root of 818959 is about 904.9635351770. The cubic root of 818959 is about 93.5593910943.

The spelling of 818959 in words is "eight hundred eighteen thousand, nine hundred fifty-nine".