209609152 has 14 divisors (see below), whose sum is σ = 415943288. Its totient is φ = 104804544.

The previous prime is 209609119. The next prime is 209609161. The reversal of 209609152 is 251906902.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1637508 + ... + 1637635.

Almost surely, 2^209609152 is an apocalyptic number.

It is an amenable number.

209609152 is a deficient number, since it is larger than the sum of its proper divisors (206334136).

209609152 is an equidigital number, since it uses as much as digits as its factorization.

209609152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3275155 (or 3275145 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 209609152 is about 14477.8849284003. The cubic root of 209609152 is about 594.0232091208.

The spelling of 209609152 in words is "two hundred nine million, six hundred nine thousand, one hundred fifty-two".