816173 has 4 divisors (see below), whose sum is σ = 818688. Its totient is φ = 813660.

The previous prime is 816169. The next prime is 816191. The reversal of 816173 is 371618.

816173 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 816173 - 2² = 816169 is a prime.

It is a super-2 number, since 2×816173² = 1332276731858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816103) 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, 683 + ... + 1448.

It is an arithmetic number, because the mean of its divisors is an integer number (204672).

2⁸¹⁶¹⁷³ is an apocalyptic number.

It is an amenable number.

816173 is a deficient number, since it is larger than the sum of its proper divisors (2515).

816173 is a wasteful number, since it uses less digits than its factorization.

816173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514.

The product of its digits is 1008, while the sum is 26.

The square root of 816173 is about 903.4229352856. The cubic root of 816173 is about 93.4531779638.

It can be divided in two parts, 816 and 173, that added together give a palindrome (989).

The spelling of 816173 in words is "eight hundred sixteen thousand, one hundred seventy-three".