100430503 has 4 divisors (see below), whose sum is σ = 100881088. Its totient is φ = 99979920.

The previous prime is 100430501. The next prime is 100430507. The reversal of 100430503 is 305034001.

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 100430503 - 2¹ = 100430501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100430501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224958 + ... + 225403.

It is an arithmetic number, because the mean of its divisors is an integer number (25220272).

Almost surely, 2^100430503 is an apocalyptic number.

100430503 is a deficient number, since it is larger than the sum of its proper divisors (450585).

100430503 is an equidigital number, since it uses as much as digits as its factorization.

100430503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450584.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 100430503 is about 10021.5020331286. The cubic root of 100430503 is about 464.8240024591.

Adding to 100430503 its reverse (305034001), we get a palindrome (405464504).

The spelling of 100430503 in words is "one hundred million, four hundred thirty thousand, five hundred three".