209798012 has 6 divisors (see below), whose sum is σ = 367146528. Its totient is φ = 104899004.

The previous prime is 209798011. The next prime is 209798023. The reversal of 209798012 is 210897902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209798011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26224748 + ... + 26224755.

It is an arithmetic number, because the mean of its divisors is an integer number (61191088).

Almost surely, 2^209798012 is an apocalyptic number.

It is an amenable number.

209798012 is a deficient number, since it is larger than the sum of its proper divisors (157348516).

209798012 is a wasteful number, since it uses less digits than its factorization.

209798012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52449507 (or 52449505 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 209798012 is about 14484.4058214343. The cubic root of 209798012 is about 594.2015625708.

The spelling of 209798012 in words is "two hundred nine million, seven hundred ninety-eight thousand, twelve".