863893 has 4 divisors (see below), whose sum is σ = 868608. Its totient is φ = 859180.

The previous prime is 863887. The next prime is 863897. The reversal of 863893 is 398368.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-863893 is a prime.

It is a super-2 number, since 2×863893² = 1492622230898, 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 (863897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2071 + ... + 2452.

It is an arithmetic number, because the mean of its divisors is an integer number (217152).

2⁸⁶³⁸⁹³ is an apocalyptic number.

It is an amenable number.

863893 is a deficient number, since it is larger than the sum of its proper divisors (4715).

863893 is a wasteful number, since it uses less digits than its factorization.

863893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714.

The product of its digits is 31104, while the sum is 37.

The square root of 863893 is about 929.4584444718. The cubic root of 863893 is about 95.2401311985.

The spelling of 863893 in words is "eight hundred sixty-three thousand, eight hundred ninety-three".