209006239 has 8 divisors (see below), whose sum is σ = 226069760. Its totient is φ = 192083616.

The previous prime is 209006209. The next prime is 209006249. The reversal of 209006239 is 932600902.

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

It is a cyclic number.

It is not a de Polignac number, because 209006239 - 2⁷ = 209006111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 209006239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209006209) 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 7 ways as a sum of consecutive naturals, for example, 32127 + ... + 38080.

It is an arithmetic number, because the mean of its divisors is an integer number (28258720).

Almost surely, 2^209006239 is an apocalyptic number.

209006239 is a deficient number, since it is larger than the sum of its proper divisors (17063521).

209006239 is a wasteful number, since it uses less digits than its factorization.

209006239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70449.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 209006239 is about 14457.0480735176. The cubic root of 209006239 is about 593.4531191123.

The spelling of 209006239 in words is "two hundred nine million, six thousand, two hundred thirty-nine".