100645203 has 4 divisors (see below), whose sum is σ = 134193608. Its totient is φ = 67096800.

The previous prime is 100645199. The next prime is 100645211. The reversal of 100645203 is 302546001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 100645203 - 2² = 100645199 is a prime.

It is a super-2 number, since 2×100645203² = 20258913773822418, which contains 22 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 100645203.

It is not an unprimeable number, because it can be changed into a prime (100645243) 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 3 ways as a sum of consecutive naturals, for example, 16774198 + ... + 16774203.

It is an arithmetic number, because the mean of its divisors is an integer number (33548402).

Almost surely, 2^100645203 is an apocalyptic number.

100645203 is a deficient number, since it is larger than the sum of its proper divisors (33548405).

100645203 is an equidigital number, since it uses as much as digits as its factorization.

100645203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33548404.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 100645203 is about 10032.2082813307. The cubic root of 100645203 is about 465.1549997788.

The spelling of 100645203 in words is "one hundred million, six hundred forty-five thousand, two hundred three".