209464985 has 8 divisors (see below), whose sum is σ = 259466496. Its totient is φ = 162166320.

The previous prime is 209464963. The next prime is 209464993. The reversal of 209464985 is 589464902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209464985 - 2⁸ = 209464729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675539 + ... + 675848.

It is an arithmetic number, because the mean of its divisors is an integer number (32433312).

Almost surely, 2^209464985 is an apocalyptic number.

It is an amenable number.

209464985 is a deficient number, since it is larger than the sum of its proper divisors (50001511).

209464985 is a wasteful number, since it uses less digits than its factorization.

209464985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351423.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 209464985 is about 14472.9052024809. The cubic root of 209464985 is about 593.8869902194.

The spelling of 209464985 in words is "two hundred nine million, four hundred sixty-four thousand, nine hundred eighty-five".