100128603 has 8 divisors (see below), whose sum is σ = 133715008. Its totient is φ = 66647304.

The previous prime is 100128569. The next prime is 100128617. The reversal of 100128603 is 306821001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100128603 - 2¹³ = 100120411 is a prime.

It is a super-3 number, since 3×100128603³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100128603.

It is not an unprimeable number, because it can be changed into a prime (100128653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24025 + ... + 27882.

It is an arithmetic number, because the mean of its divisors is an integer number (16714376).

Almost surely, 2^100128603 is an apocalyptic number.

100128603 is a deficient number, since it is larger than the sum of its proper divisors (33586405).

100128603 is an equidigital number, since it uses as much as digits as its factorization.

100128603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52553.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 100128603 is about 10006.4280839868. The cubic root of 100128603 is about 464.3577722095.

Adding to 100128603 its reverse (306821001), we get a palindrome (406949604).

The spelling of 100128603 in words is "one hundred million, one hundred twenty-eight thousand, six hundred three".