209091122 has 8 divisors (see below), whose sum is σ = 313758336. Its totient is φ = 104505012.

The previous prime is 209091119. The next prime is 209091139. The reversal of 209091122 is 221190902.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 209091091 and 209091100.

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, 13358 + ... + 24425.

It is an arithmetic number, because the mean of its divisors is an integer number (39219792).

Almost surely, 2^209091122 is an apocalyptic number.

209091122 is a deficient number, since it is larger than the sum of its proper divisors (104667214).

209091122 is a wasteful number, since it uses less digits than its factorization.

209091122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40552.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 209091122 is about 14459.9834716365. The cubic root of 209091122 is about 593.5334472777.

The spelling of 209091122 in words is "two hundred nine million, ninety-one thousand, one hundred twenty-two".