210100009 has 8 divisors (see below), whose sum is σ = 250554240. Its totient is φ = 172255776.

The previous prime is 210099979. The next prime is 210100013. The reversal of 210100009 is 900001012.

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

It is not a de Polignac number, because 210100009 - 2⁵ = 210099977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210101009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652324 + ... + 652645.

It is an arithmetic number, because the mean of its divisors is an integer number (31319280).

Almost surely, 2^210100009 is an apocalyptic number.

It is an amenable number.

210100009 is a deficient number, since it is larger than the sum of its proper divisors (40454231).

210100009 is a wasteful number, since it uses less digits than its factorization.

210100009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304999.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 210100009 is about 14494.8269737862. The cubic root of 210100009 is about 594.4865367605.

The spelling of 210100009 in words is "two hundred ten million, one hundred thousand, nine".