868647 has 8 divisors (see below), whose sum is σ = 1247344. Its totient is φ = 534528.

The previous prime is 868639. The next prime is 868663. The reversal of 868647 is 746868.

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

It is not a de Polignac number, because 868647 - 2³ = 868639 is a prime.

It is a super-2 number, since 2×868647² = 1509095221218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 22273 = 868647 / (8 + 6 + 8 + 6 + 4 + 7).

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868647.

It is not an unprimeable number, because it can be changed into a prime (868697) 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, 11098 + ... + 11175.

It is an arithmetic number, because the mean of its divisors is an integer number (155918).

2⁸⁶⁸⁶⁴⁷ is an apocalyptic number.

868647 is a deficient number, since it is larger than the sum of its proper divisors (378697).

868647 is a wasteful number, since it uses less digits than its factorization.

868647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22289.

The product of its digits is 64512, while the sum is 39.

The square root of 868647 is about 932.0123389741. The cubic root of 868647 is about 95.4145137436.

The spelling of 868647 in words is "eight hundred sixty-eight thousand, six hundred forty-seven".