100001909 has 8 divisors (see below), whose sum is σ = 114386880. Its totient is φ = 85641696.

The previous prime is 100001903. The next prime is 100001927. The reversal of 100001909 is 909100001.

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

It is not a de Polignac number, because 100001909 - 2⁴ = 100001893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001903) 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 7 ways as a sum of consecutive naturals, for example, 3482 + ... + 14564.

It is an arithmetic number, because the mean of its divisors is an integer number (14298360).

Almost surely, 2^100001909 is an apocalyptic number.

It is an amenable number.

100001909 is a deficient number, since it is larger than the sum of its proper divisors (14384971).

100001909 is a wasteful number, since it uses less digits than its factorization.

100001909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12379.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 100001909 is about 10000.0954495445. The cubic root of 100001909 is about 464.1618369402.

It can be divided in two parts, 100001 and 909, that multiplied together give a palindrome (90900909).

The spelling of 100001909 in words is "one hundred million, one thousand, nine hundred nine".