209085412 has 6 divisors (see below), whose sum is σ = 365899478. Its totient is φ = 104542704.

The previous prime is 209085403. The next prime is 209085413. The reversal of 209085412 is 214580902.

It can be written as a sum of positive squares in only one way, i.e., 189778176 + 19307236 = 13776^2 + 4394^2 .

It is a super-2 number, since 2×209085412² = 87433419022419488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (209085413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26135673 + ... + 26135680.

Almost surely, 2^209085412 is an apocalyptic number.

It is an amenable number.

209085412 is a deficient number, since it is larger than the sum of its proper divisors (156814066).

209085412 is a wasteful number, since it uses less digits than its factorization.

209085412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52271357 (or 52271355 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 209085412 is about 14459.7860288457. The cubic root of 209085412 is about 593.5280443593.

The spelling of 209085412 in words is "two hundred nine million, eighty-five thousand, four hundred twelve".