209027139 has 8 divisors (see below), whose sum is σ = 278942400. Its totient is φ = 139231656.

The previous prime is 209027129. The next prime is 209027173. The reversal of 209027139 is 931720902.

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

It is not a de Polignac number, because 209027139 - 2⁵ = 209027107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209027129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25789 + ... + 32910.

It is an arithmetic number, because the mean of its divisors is an integer number (34867800).

Almost surely, 2^209027139 is an apocalyptic number.

209027139 is a deficient number, since it is larger than the sum of its proper divisors (69915261).

209027139 is a wasteful number, since it uses less digits than its factorization.

209027139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59889.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 209027139 is about 14457.7708862743. The cubic root of 209027139 is about 593.4728996331.

The spelling of 209027139 in words is "two hundred nine million, twenty-seven thousand, one hundred thirty-nine".