209100008 has 32 divisors (see below), whose sum is σ = 422876160. Its totient is φ = 96358080.

The previous prime is 209099993. The next prime is 209100011. The reversal of 209100008 is 800001902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93641 + ... + 95847.

It is an arithmetic number, because the mean of its divisors is an integer number (13214880).

Almost surely, 2^209100008 is an apocalyptic number.

It is an amenable number.

209100008 is an abundant number, since it is smaller than the sum of its proper divisors (213776152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209100008 is a wasteful number, since it uses less digits than its factorization.

209100008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137 (or 3133 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 209100008 is about 14460.2907301340. The cubic root of 209100008 is about 593.5418551965.

The spelling of 209100008 in words is "two hundred nine million, one hundred thousand, eight".