866947 has 4 divisors (see below), whose sum is σ = 890416. Its totient is φ = 843480.

The previous prime is 866941. The next prime is 866953. The reversal of 866947 is 749668.

866947 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.

It is an interprime number because it is at equal distance from previous prime (866941) and next prime (866953).

It is a cyclic number.

It is not a de Polignac number, because 866947 - 2⁷ = 866819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866941) 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, 11679 + ... + 11752.

It is an arithmetic number, because the mean of its divisors is an integer number (222604).

2⁸⁶⁶⁹⁴⁷ is an apocalyptic number.

866947 is a deficient number, since it is larger than the sum of its proper divisors (23469).

866947 is a wasteful number, since it uses less digits than its factorization.

866947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23468.

The product of its digits is 72576, while the sum is 40.

The square root of 866947 is about 931.0998872302. The cubic root of 866947 is about 95.3522289092.

The spelling of 866947 in words is "eight hundred sixty-six thousand, nine hundred forty-seven".