816773 has 4 divisors (see below), whose sum is σ = 819180. Its totient is φ = 814368.

The previous prime is 816769. The next prime is 816779. The reversal of 816773 is 377618.

It is a happy number.

816773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 351649 + 465124 = 593^2 + 682^2 .

It is a cyclic number.

It is not a de Polignac number, because 816773 - 2² = 816769 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816779) 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, 590 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (204795).

2⁸¹⁶⁷⁷³ is an apocalyptic number.

It is an amenable number.

816773 is a deficient number, since it is larger than the sum of its proper divisors (2407).

816773 is a wasteful number, since it uses less digits than its factorization.

816773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406.

The product of its digits is 7056, while the sum is 32.

The square root of 816773 is about 903.7549446614. The cubic root of 816773 is about 93.4760726900.

The spelling of 816773 in words is "eight hundred sixteen thousand, seven hundred seventy-three".