800645 has 8 divisors (see below), whose sum is σ = 981504. Its totient is φ = 626704.

The previous prime is 800623. The next prime is 800647. The reversal of 800645 is 546008.

800645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 800645 - 2¹⁰ = 799621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 800645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800647) 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, 1469 + ... + 1938.

It is an arithmetic number, because the mean of its divisors is an integer number (122688).

2⁸⁰⁰⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

800645 is a deficient number, since it is larger than the sum of its proper divisors (180859).

800645 is a wasteful number, since it uses less digits than its factorization.

800645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 800645 is about 894.7876843140. The cubic root of 800645 is about 92.8567185103.

The spelling of 800645 in words is "eight hundred thousand, six hundred forty-five".