209107012 has 6 divisors (see below), whose sum is σ = 365937278. Its totient is φ = 104553504.

The previous prime is 209107009. The next prime is 209107037. The reversal of 209107012 is 210701902.

It can be written as a sum of positive squares in only one way, i.e., 207821056 + 1285956 = 14416^2 + 1134^2 .

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, 26138373 + ... + 26138380.

Almost surely, 2^209107012 is an apocalyptic number.

It is an amenable number.

209107012 is a deficient number, since it is larger than the sum of its proper divisors (156830266).

209107012 is a wasteful number, since it uses less digits than its factorization.

209107012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52276757 (or 52276755 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 209107012 is about 14460.5329085757. The cubic root of 209107012 is about 593.5484822020.

Adding to 209107012 its reverse (210701902), we get a palindrome (419808914).

The spelling of 209107012 in words is "two hundred nine million, one hundred seven thousand, twelve".