800389 has 4 divisors (see below), whose sum is σ = 826240. Its totient is φ = 774540.

The previous prime is 800357. The next prime is 800399. The reversal of 800389 is 983008.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 800389 - 2⁵ = 800357 is a prime.

It is a Duffinian number.

800389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800329) 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, 12879 + ... + 12940.

It is an arithmetic number, because the mean of its divisors is an integer number (206560).

2⁸⁰⁰³⁸⁹ is an apocalyptic number.

It is an amenable number.

800389 is a deficient number, since it is larger than the sum of its proper divisors (25851).

800389 is a wasteful number, since it uses less digits than its factorization.

800389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25850.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 800389 is about 894.6446221825. The cubic root of 800389 is about 92.8468207179.

The spelling of 800389 in words is "eight hundred thousand, three hundred eighty-nine".