209212994 has 16 divisors (see below), whose sum is σ = 319464000. Its totient is φ = 102734544.

The previous prime is 209212979. The next prime is 209213021. The reversal of 209212994 is 499212902.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45932 + ... + 50280.

It is an arithmetic number, because the mean of its divisors is an integer number (19966500).

Almost surely, 2^209212994 is an apocalyptic number.

209212994 is a deficient number, since it is larger than the sum of its proper divisors (110251006).

209212994 is a wasteful number, since it uses less digits than its factorization.

209212994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777.

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

The square root of 209212994 is about 14464.1969704509. The cubic root of 209212994 is about 593.6487416021.

The spelling of 209212994 in words is "two hundred nine million, two hundred twelve thousand, nine hundred ninety-four".