209668070 has 16 divisors (see below), whose sum is σ = 379514160. Its totient is φ = 83397984.

The previous prime is 209668051. The next prime is 209668073. The reversal of 209668070 is 70866902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209668073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56777 + ... + 60356.

It is an arithmetic number, because the mean of its divisors is an integer number (23719635).

Almost surely, 2^209668070 is an apocalyptic number.

209668070 is a deficient number, since it is larger than the sum of its proper divisors (169846090).

209668070 is a wasteful number, since it uses less digits than its factorization.

209668070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117319.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 209668070 is about 14479.9195439754. The cubic root of 209668070 is about 594.0788609223.

The spelling of 209668070 in words is "two hundred nine million, six hundred sixty-eight thousand, seventy".