209494612 has 12 divisors (see below), whose sum is σ = 366770740. Its totient is φ = 104702976.

The previous prime is 209494591. The next prime is 209494613. The reversal of 209494612 is 216494902.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66357316 + 143137296 = 8146^2 + 11964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209494613) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1018 + ... + 20494.

Almost surely, 2^209494612 is an apocalyptic number.

It is an amenable number.

209494612 is a deficient number, since it is larger than the sum of its proper divisors (157276128).

209494612 is a wasteful number, since it uses less digits than its factorization.

209494612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22170 (or 22168 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 209494612 is about 14473.9286995618. The cubic root of 209494612 is about 593.9149889489.

The spelling of 209494612 in words is "two hundred nine million, four hundred ninety-four thousand, six hundred twelve".