209067312 has 30 divisors (see below), whose sum is σ = 540349468. Its totient is φ = 69655712.

The previous prime is 209067311. The next prime is 209067329. The reversal of 209067312 is 213760902.

It is a self number, because there is not a number n which added to its sum of digits gives 209067312.

It is not an unprimeable number, because it can be changed into a prime (209067311) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 99133 + ... + 101219.

Almost surely, 2^209067312 is an apocalyptic number.

It is an amenable number.

209067312 is an abundant number, since it is smaller than the sum of its proper divisors (331282156).

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

209067312 is an frugal number, since it uses more digits than its factorization.

209067312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185 (or 2092 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 209067312 is about 14459.1601415850. The cubic root of 209067312 is about 593.5109171201.

The spelling of 209067312 in words is "two hundred nine million, sixty-seven thousand, three hundred twelve".