816918 has 16 divisors (see below), whose sum is σ = 1730160. Its totient is φ = 256256.

The previous prime is 816917. The next prime is 816919. The reversal of 816918 is 819618.

It is an interprime number because it is at equal distance from previous prime (816917) and next prime (816919).

816918 is a strobogrammatic number because it is the same when read upside-down.

816918 is a modest number, since divided by 918 gives 816 as remainder.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816911) 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, 3903 + ... + 4106.

It is an arithmetic number, because the mean of its divisors is an integer number (108135).

2⁸¹⁶⁹¹⁸ is an apocalyptic number.

816918 is an abundant number, since it is smaller than the sum of its proper divisors (913242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816918 is a wasteful number, since it uses less digits than its factorization.

816918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8031.

The product of its digits is 3456, while the sum is 33.

The square root of 816918 is about 903.8351619626. The cubic root of 816918 is about 93.4816038999.

The spelling of 816918 in words is "eight hundred sixteen thousand, nine hundred eighteen".