873 has 6 divisors (see below), whose sum is σ = 1274. Its totient is φ = 576.

The previous prime is 863. The next prime is 877. The reversal of 873 is 378.

873 is nontrivially palindromic in base 8 and base 15.

It can be written as a sum of positive squares in only one way, i.e., 729 + 144 = 27^2 + 12^2 .

It is not a de Polignac number, because 873 - 2⁴ = 857 is a prime.

It is a Duffinian number.

873 is an undulating number in base 15.

It is a Curzon number.

873 is a lucky number.

It is a plaindrome in base 7 and base 16.

It is a nialpdrome in base 10 and base 13.

It is not an unprimeable number, because it can be changed into a prime (877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40 + ... + 57.

2⁸⁷³ is an apocalyptic number.

It is an amenable number.

873 is a deficient number, since it is larger than the sum of its proper divisors (401).

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

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

The sum of its prime factors is 103 (or 100 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 873 is about 29.5465734054. The cubic root of 873 is about 9.5573629976.

It can be divided in two parts, 8 and 73, that added together give a 4-th power (81 = 3⁴).

The spelling of 873 in words is "eight hundred seventy-three", and thus it is an aban number and an oban number.