100904409 has 24 divisors (see below), whose sum is σ = 148803200. Its totient is φ = 65875680.

The previous prime is 100904407. The next prime is 100904413. The reversal of 100904409 is 904409001.

It is not a de Polignac number, because 100904409 - 2¹ = 100904407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100904407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98319 + ... + 99339.

Almost surely, 2^100904409 is an apocalyptic number.

It is an amenable number.

100904409 is a deficient number, since it is larger than the sum of its proper divisors (47898791).

100904409 is a wasteful number, since it uses less digits than its factorization.

100904409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 100904409 is about 10045.1186653021. The cubic root of 100904409 is about 465.5539842087.

The spelling of 100904409 in words is "one hundred million, nine hundred four thousand, four hundred nine".