100000003 has 4 divisors (see below), whose sum is σ = 100156168. Its totient is φ = 99843840.

The previous prime is 99999989. The next prime is 100000007. The reversal of 100000003 is 300000001.

It is a happy number.

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 100000003 - 2⁵ = 99999971 is a prime.

It is a Duffinian number.

100000003 is a modest number, since divided by 3 gives 1 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 99999938 and 100000001.

It is not an unprimeable number, because it can be changed into a prime (100000007) 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, 77118 + ... + 78403.

It is an arithmetic number, because the mean of its divisors is an integer number (25039042).

Almost surely, 2^100000003 is an apocalyptic number.

100000003 is a deficient number, since it is larger than the sum of its proper divisors (156165).

100000003 is an equidigital number, since it uses as much as digits as its factorization.

100000003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156164.

The product of its (nonzero) digits is 3, while the sum is 4.

The square root of 100000003 is about 10000.0001500000. Note that the first 3 decimals coincide. The cubic root of 100000003 is about 464.1588880029.

Adding to 100000003 its reverse (300000001), we get a palindrome (400000004).

The spelling of 100000003 in words is "one hundred million, three", and thus it is an aban number.