100470809 has 8 divisors (see below), whose sum is σ = 101265000. Its totient is φ = 99680256.

The previous prime is 100470779. The next prime is 100470827. The reversal of 100470809 is 908074001.

It can be written as a sum of positive squares in 4 ways, for example, as 10220809 + 90250000 = 3197^2 + 9500^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100470809 - 2¹² = 100466713 is a prime.

It is a super-2 number, since 2×100470809² = 20188766922228962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100470889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79817 + ... + 81065.

It is an arithmetic number, because the mean of its divisors is an integer number (12658125).

Almost surely, 2^100470809 is an apocalyptic number.

It is an amenable number.

100470809 is a deficient number, since it is larger than the sum of its proper divisors (794191).

100470809 is a wasteful number, since it uses less digits than its factorization.

100470809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 100470809 is about 10023.5128073944. The cubic root of 100470809 is about 464.8861770969.

The spelling of 100470809 in words is "one hundred million, four hundred seventy thousand, eight hundred nine".