209404122 has 16 divisors (see below), whose sum is σ = 419414112. Its totient is φ = 69700400.

The previous prime is 209404093. The next prime is 209404123. The reversal of 209404122 is 221404902.

209404122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 209404092 and 209404101.

It is not an unprimeable number, because it can be changed into a prime (209404123) 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, 20688 + ... + 29099.

It is an arithmetic number, because the mean of its divisors is an integer number (26213382).

Almost surely, 2^209404122 is an apocalyptic number.

209404122 is an abundant number, since it is smaller than the sum of its proper divisors (210009990).

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

209404122 is a wasteful number, since it uses less digits than its factorization.

209404122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50493.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 209404122 is about 14470.8023965501. The cubic root of 209404122 is about 593.8294639056.

The spelling of 209404122 in words is "two hundred nine million, four hundred four thousand, one hundred twenty-two".