209214994 has 16 divisors (see below), whose sum is σ = 319455000. Its totient is φ = 102735360.

The previous prime is 209214931. The next prime is 209214997. The reversal of 209214994 is 499412902.

It can be written as a sum of positive squares in 4 ways, for example, as 177235969 + 31979025 = 13313^2 + 5655^2 .

It is not an unprimeable number, because it can be changed into a prime (209214997) 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, 151692 + ... + 153064.

Almost surely, 2^209214994 is an apocalyptic number.

209214994 is a deficient number, since it is larger than the sum of its proper divisors (110240006).

209214994 is a wasteful number, since it uses less digits than its factorization.

209214994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 209214994 is about 14464.2661065123. The cubic root of 209214994 is about 593.6506332847.

The spelling of 209214994 in words is "two hundred nine million, two hundred fourteen thousand, nine hundred ninety-four".