209390704 has 20 divisors (see below), whose sum is σ = 413350776. Its totient is φ = 102719552.

The previous prime is 209390677. The next prime is 209390719. The reversal of 209390704 is 407093902.

It is a self number, because there is not a number n which added to its sum of digits gives 209390704.

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 in 3 ways as a sum of consecutive naturals, for example, 122614 + ... + 124309.

Almost surely, 2^209390704 is an apocalyptic number.

It is an amenable number.

209390704 is a deficient number, since it is larger than the sum of its proper divisors (203960072).

209390704 is a wasteful number, since it uses less digits than its factorization.

209390704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246984 (or 246978 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 209390704 is about 14470.3387659032. The cubic root of 209390704 is about 593.8167800198.

The spelling of 209390704 in words is "two hundred nine million, three hundred ninety thousand, seven hundred four".