209123422 has 16 divisors (see below), whose sum is σ = 316868112. Its totient is φ = 103504960.

The previous prime is 209123419. The next prime is 209123441. The reversal of 209123422 is 224321902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145218 + ... + 146650.

It is an arithmetic number, because the mean of its divisors is an integer number (19804257).

Almost surely, 2^209123422 is an apocalyptic number.

209123422 is a deficient number, since it is larger than the sum of its proper divisors (107744690).

209123422 is a wasteful number, since it uses less digits than its factorization.

209123422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 209123422 is about 14461.1003039188. The cubic root of 209123422 is about 593.5640083445.

The spelling of 209123422 in words is "two hundred nine million, one hundred twenty-three thousand, four hundred twenty-two".