209797206 has 16 divisors (see below), whose sum is σ = 419905200. Its totient is φ = 69880608.

The previous prime is 209797201. The next prime is 209797213. The reversal of 209797206 is 602797902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209797201) 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, 3661 + ... + 20808.

It is an arithmetic number, because the mean of its divisors is an integer number (26244075).

Almost surely, 2^209797206 is an apocalyptic number.

209797206 is an abundant number, since it is smaller than the sum of its proper divisors (210107994).

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

209797206 is a wasteful number, since it uses less digits than its factorization.

209797206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25903.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 209797206 is about 14484.3779983816. The cubic root of 209797206 is about 594.2008016372.

The spelling of 209797206 in words is "two hundred nine million, seven hundred ninety-seven thousand, two hundred six".