100643103 has 12 divisors (see below), whose sum is σ = 158589288. Its totient is φ = 60995760.

The previous prime is 100643083. The next prime is 100643113. The reversal of 100643103 is 301346001.

100643103 is a `hidden beast` number, since 10 + 0 + 643 + 10 + 3 = 666.

It is not a de Polignac number, because 100643103 - 2¹⁰ = 100642079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100643113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508200 + ... + 508397.

It is an arithmetic number, because the mean of its divisors is an integer number (13215774).

Almost surely, 2^100643103 is an apocalyptic number.

100643103 is a deficient number, since it is larger than the sum of its proper divisors (57946185).

100643103 is a wasteful number, since it uses less digits than its factorization.

100643103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016614 (or 1016611 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 100643103 is about 10032.1036178859. The cubic root of 100643103 is about 465.1517645450.

Adding to 100643103 its reverse (301346001), we get a palindrome (401989104).

The spelling of 100643103 in words is "one hundred million, six hundred forty-three thousand, one hundred three".