209492066 has 16 divisors (see below), whose sum is σ = 366771456. Its totient is φ = 87871776.

The previous prime is 209492057. The next prime is 209492069. The reversal of 209492066 is 660294902.

It is not an unprimeable number, because it can be changed into a prime (209492069) 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 7 ways as a sum of consecutive naturals, for example, 158531 + ... + 159846.

It is an arithmetic number, because the mean of its divisors is an integer number (22923216).

Almost surely, 2^209492066 is an apocalyptic number.

209492066 is a deficient number, since it is larger than the sum of its proper divisors (157279390).

209492066 is a wasteful number, since it uses less digits than its factorization.

209492066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318433.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 209492066 is about 14473.8407480530. The cubic root of 209492066 is about 593.9125829782.

The spelling of 209492066 in words is "two hundred nine million, four hundred ninety-two thousand, sixty-six".