209977006 has 8 divisors (see below), whose sum is σ = 320129064. Its totient is φ = 103267320.

The previous prime is 209977003. The next prime is 209977057. The reversal of 209977006 is 600779902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 209977006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209977003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860440 + ... + 860683.

It is an arithmetic number, because the mean of its divisors is an integer number (40016133).

Almost surely, 2^209977006 is an apocalyptic number.

209977006 is a deficient number, since it is larger than the sum of its proper divisors (110152058).

209977006 is a wasteful number, since it uses less digits than its factorization.

209977006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721186.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 209977006 is about 14490.5833560972. The cubic root of 209977006 is about 594.3705001128.

The spelling of 209977006 in words is "two hundred nine million, nine hundred seventy-seven thousand, six".