209065412 has 6 divisors (see below), whose sum is σ = 365864478. Its totient is φ = 104532704.

The previous prime is 209065403. The next prime is 209065421. The reversal of 209065412 is 214560902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (209065403) and next prime (209065421).

It can be written as a sum of positive squares in only one way, i.e., 194212096 + 14853316 = 13936^2 + 3854^2 .

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, 26133173 + ... + 26133180.

It is an arithmetic number, because the mean of its divisors is an integer number (60977413).

Almost surely, 2^209065412 is an apocalyptic number.

It is an amenable number.

209065412 is a deficient number, since it is larger than the sum of its proper divisors (156799066).

209065412 is a wasteful number, since it uses less digits than its factorization.

209065412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52266357 (or 52266355 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 209065412 is about 14459.0944391411. The cubic root of 209065412 is about 593.5091191757.

The spelling of 209065412 in words is "two hundred nine million, sixty-five thousand, four hundred twelve".