863873 has 6 divisors (see below), whose sum is σ = 912114. Its totient is φ = 818064.

The previous prime is 863869. The next prime is 863879. The reversal of 863873 is 378368.

It can be written as a sum of positive squares in only one way, i.e., 494209 + 369664 = 703^2 + 608^2 .

It is not a de Polignac number, because 863873 - 2² = 863869 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (863879) 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, 836 + ... + 1557.

It is an arithmetic number, because the mean of its divisors is an integer number (152019).

2⁸⁶³⁸⁷³ is an apocalyptic number.

It is an amenable number.

863873 is a deficient number, since it is larger than the sum of its proper divisors (48241).

863873 is a wasteful number, since it uses less digits than its factorization.

863873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431 (or 2412 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 863873 is about 929.4476854563. The cubic root of 863873 is about 95.2393962243.

The spelling of 863873 in words is "eight hundred sixty-three thousand, eight hundred seventy-three".