100403 has 2 divisors, whose sum is σ = 100404. Its totient is φ = 100402.

The previous prime is 100393. The next prime is 100411. The reversal of 100403 is 304001.

It is an a-pointer prime, because the next prime (100411) can be obtained adding 100403 to its sum of digits (8).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100403 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (100483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50201 + 50202.

It is an arithmetic number, because the mean of its divisors is an integer number (50202).

2¹⁰⁰⁴⁰³ is an apocalyptic number.

100403 is a deficient number, since it is larger than the sum of its proper divisors (1).

100403 is an equidigital number, since it uses as much as digits as its factorization.

100403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 100403 is about 316.8643242778. The cubic root of 100403 is about 46.4781567736.

Adding to 100403 its reverse (304001), we get a palindrome (404404).

The spelling of 100403 in words is "one hundred thousand, four hundred three", and thus it is an iban number.