873857 has 4 divisors (see below), whose sum is σ = 904020. Its totient is φ = 843696.

The previous prime is 873787. The next prime is 873863. The reversal of 873857 is 758378.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758378 = 2 ⋅379189.

It can be written as a sum of positive squares in 2 ways, for example, as 361201 + 512656 = 601^2 + 716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-873857 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 873857.

It is not an unprimeable number, because it can be changed into a prime (873877) 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, 15038 + ... + 15095.

It is an arithmetic number, because the mean of its divisors is an integer number (226005).

2⁸⁷³⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

873857 is a deficient number, since it is larger than the sum of its proper divisors (30163).

873857 is a wasteful number, since it uses less digits than its factorization.

873857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30162.

The product of its digits is 47040, while the sum is 38.

The square root of 873857 is about 934.8031878422. The cubic root of 873857 is about 95.6048937464.

The spelling of 873857 in words is "eight hundred seventy-three thousand, eight hundred fifty-seven".