863447 has 8 divisors (see below), whose sum is σ = 984816. Its totient is φ = 749952.

The previous prime is 863393. The next prime is 863479. The reversal of 863447 is 744368.

It is a happy number.

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 863447 - 2¹⁰ = 862423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863497) 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, 1733 + ... + 2174.

It is an arithmetic number, because the mean of its divisors is an integer number (123102).

2⁸⁶³⁴⁴⁷ is an apocalyptic number.

863447 is a deficient number, since it is larger than the sum of its proper divisors (121369).

863447 is a wasteful number, since it uses less digits than its factorization.

863447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937.

The product of its digits is 16128, while the sum is 32.

The square root of 863447 is about 929.2184888389. The cubic root of 863447 is about 95.2237385780.

The spelling of 863447 in words is "eight hundred sixty-three thousand, four hundred forty-seven".