100320003 has 36 divisors (see below), whose sum is σ = 170192880. Its totient is φ = 56772576.

The previous prime is 100319993. The next prime is 100320007. The reversal of 100320003 is 300023001.

It is a happy number.

It is not a de Polignac number, because 100320003 - 2⁶ = 100319939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (100320007) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47026 + ... + 49112.

It is an arithmetic number, because the mean of its divisors is an integer number (4727580).

Almost surely, 2^100320003 is an apocalyptic number.

100320003 is a deficient number, since it is larger than the sum of its proper divisors (69872877).

100320003 is a wasteful number, since it uses less digits than its factorization.

100320003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216 (or 2206 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 100320003 is about 10015.9873701997. The cubic root of 100320003 is about 464.6534636291.

Adding to 100320003 its reverse (300023001), we get a palindrome (400343004).

The spelling of 100320003 in words is "one hundred million, three hundred twenty thousand, three".