209412992 has 16 divisors (see below), whose sum is σ = 417190200. Its totient is φ = 104706432.

The previous prime is 209412979. The next prime is 209413019. The reversal of 209412992 is 299214902.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

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, 817892 + ... + 818147.

Almost surely, 2^209412992 is an apocalyptic number.

It is an amenable number.

209412992 is a deficient number, since it is larger than the sum of its proper divisors (207777208).

209412992 is an equidigital number, since it uses as much as digits as its factorization.

209412992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636053 (or 1636041 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 209412992 is about 14471.1088725087. The cubic root of 209412992 is about 593.8378483203.

The spelling of 209412992 in words is "two hundred nine million, four hundred twelve thousand, nine hundred ninety-two".