863947 has 8 divisors (see below), whose sum is σ = 999936. Its totient is φ = 731112.

The previous prime is 863921. The next prime is 863959. The reversal of 863947 is 749368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 863947 - 2¹¹ = 861899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (863917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163 + ... + 1324.

It is an arithmetic number, because the mean of its divisors is an integer number (124992).

2⁸⁶³⁹⁴⁷ is an apocalyptic number.

863947 is a deficient number, since it is larger than the sum of its proper divisors (135989).

863947 is a wasteful number, since it uses less digits than its factorization.

863947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577.

The product of its digits is 36288, while the sum is 37.

The square root of 863947 is about 929.4874931918. The cubic root of 863947 is about 95.2421155723.

The spelling of 863947 in words is "eight hundred sixty-three thousand, nine hundred forty-seven".