100504609 has 4 divisors (see below), whose sum is σ = 100728900. Its totient is φ = 100280320.

The previous prime is 100504603. The next prime is 100504627. The reversal of 100504609 is 906405001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20223009 + 80281600 = 4497^2 + 8960^2 .

It is a cyclic number.

It is not a de Polignac number, because 100504609 - 2⁵ = 100504577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100504603) 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, 111472 + ... + 112369.

It is an arithmetic number, because the mean of its divisors is an integer number (25182225).

Almost surely, 2^100504609 is an apocalyptic number.

It is an amenable number.

100504609 is a deficient number, since it is larger than the sum of its proper divisors (224291).

100504609 is an equidigital number, since it uses as much as digits as its factorization.

100504609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224290.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 100504609 is about 10025.1987012727. The cubic root of 100504609 is about 464.9383029871.

The spelling of 100504609 in words is "one hundred million, five hundred four thousand, six hundred nine".