863381 has 4 divisors (see below), whose sum is σ = 891264. Its totient is φ = 835500.

The previous prime is 863377. The next prime is 863393. The reversal of 863381 is 183368.

863381 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 863381 - 2² = 863377 is a prime.

It is a super-2 number, since 2×863381² = 1490853502322, 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 (863081) 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, 13895 + ... + 13956.

It is an arithmetic number, because the mean of its divisors is an integer number (222816).

2⁸⁶³³⁸¹ is an apocalyptic number.

It is an amenable number.

863381 is a deficient number, since it is larger than the sum of its proper divisors (27883).

863381 is a wasteful number, since it uses less digits than its factorization.

863381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27882.

The product of its digits is 3456, while the sum is 29.

The square root of 863381 is about 929.1829744458. The cubic root of 863381 is about 95.2213122847.

The spelling of 863381 in words is "eight hundred sixty-three thousand, three hundred eighty-one".