209722106 has 8 divisors (see below), whose sum is σ = 343181664. Its totient is φ = 95328220.

The previous prime is 209722091. The next prime is 209722129. The reversal of 209722106 is 601227902.

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

It is a super-4 number, since 4×209722106⁴ (a number of 34 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4766390 + ... + 4766433.

It is an arithmetic number, because the mean of its divisors is an integer number (42897708).

Almost surely, 2^209722106 is an apocalyptic number.

209722106 is a deficient number, since it is larger than the sum of its proper divisors (133459558).

209722106 is a wasteful number, since it uses less digits than its factorization.

209722106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9532836.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 209722106 is about 14481.7853181160. The cubic root of 209722106 is about 594.1298921991.

The spelling of 209722106 in words is "two hundred nine million, seven hundred twenty-two thousand, one hundred six".