209675345 has 16 divisors (see below), whose sum is σ = 278249472. Its totient is φ = 150399360.

The previous prime is 209675341. The next prime is 209675359. The reversal of 209675345 is 543576902.

It is not a de Polignac number, because 209675345 - 2² = 209675341 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209675341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22097 + ... + 30126.

It is an arithmetic number, because the mean of its divisors is an integer number (17390592).

Almost surely, 2^209675345 is an apocalyptic number.

It is an amenable number.

209675345 is a deficient number, since it is larger than the sum of its proper divisors (68574127).

209675345 is a wasteful number, since it uses less digits than its factorization.

209675345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52312.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 209675345 is about 14480.1707517557. The cubic root of 209675345 is about 594.0857318998.

The spelling of 209675345 in words is "two hundred nine million, six hundred seventy-five thousand, three hundred forty-five".