800003 has 4 divisors (see below), whose sum is σ = 847080. Its totient is φ = 752928.

The previous prime is 799999. The next prime is 800011. The reversal of 800003 is 300008.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 800003 - 2² = 799999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800053) 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, 23513 + ... + 23546.

It is an arithmetic number, because the mean of its divisors is an integer number (211770).

2⁸⁰⁰⁰⁰³ is an apocalyptic number.

800003 is a deficient number, since it is larger than the sum of its proper divisors (47077).

800003 is a wasteful number, since it uses less digits than its factorization.

800003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47076.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 800003 is about 894.4288680493. The cubic root of 800003 is about 92.8318927118.

Adding to 800003 its reverse (300008), we get a palindrome (1100011).

The spelling of 800003 in words is "eight hundred thousand, three".