100109903 has 4 divisors (see below), whose sum is σ = 100466448. Its totient is φ = 99753360.

The previous prime is 100109899. The next prime is 100109921. The reversal of 100109903 is 309901001.

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 100109903 - 2² = 100109899 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 (100109983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177851 + ... + 178412.

It is an arithmetic number, because the mean of its divisors is an integer number (25116612).

Almost surely, 2^100109903 is an apocalyptic number.

100109903 is a deficient number, since it is larger than the sum of its proper divisors (356545).

100109903 is an equidigital number, since it uses as much as digits as its factorization.

100109903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356544.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 100109903 is about 10005.4936409954. The cubic root of 100109903 is about 464.3288626182.

The spelling of 100109903 in words is "one hundred million, one hundred nine thousand, nine hundred three".