818973 has 6 divisors (see below), whose sum is σ = 1182974. Its totient is φ = 545976.

The previous prime is 818969. The next prime is 818977. The reversal of 818973 is 379818.

It is an interprime number because it is at equal distance from previous prime (818969) and next prime (818977).

It can be written as a sum of positive squares in only one way, i.e., 480249 + 338724 = 693^2 + 582^2 .

It is not a de Polignac number, because 818973 - 2² = 818969 is a prime.

It is a Duffinian 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 (818977) by changing a digit.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45490 + ... + 45507.

2⁸¹⁸⁹⁷³ is an apocalyptic number.

It is an amenable number.

818973 is a deficient number, since it is larger than the sum of its proper divisors (364001).

818973 is a wasteful number, since it uses less digits than its factorization.

818973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91003 (or 91000 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 818973 is about 904.9712702622. The cubic root of 818973 is about 93.5599242199.

It can be divided in two parts, 8 and 18973, that added together give a palindrome (18981).

The spelling of 818973 in words is "eight hundred eighteen thousand, nine hundred seventy-three".