863971 has 4 divisors (see below), whose sum is σ = 869632. Its totient is φ = 858312.

The previous prime is 863959. The next prime is 863983. The reversal of 863971 is 179368.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (863959) and next prime (863983).

It is a cyclic number.

It is not a de Polignac number, because 863971 - 2⁷ = 863843 is a prime.

It is the 930-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863921) by changing a digit.

It is a nontrivial repunit in base 929.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2595 + ... + 2908.

It is an arithmetic number, because the mean of its divisors is an integer number (217408).

2⁸⁶³⁹⁷¹ is an apocalyptic number.

863971 is a deficient number, since it is larger than the sum of its proper divisors (5661).

863971 is a wasteful number, since it uses less digits than its factorization.

863971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5660.

The product of its digits is 9072, while the sum is 34.

The square root of 863971 is about 929.5004034426. The cubic root of 863971 is about 95.2429974897.

The spelling of 863971 in words is "eight hundred sixty-three thousand, nine hundred seventy-one".