209205599234 has 4 divisors (see below), whose sum is σ = 313808398854. Its totient is φ = 104602799616.

The previous prime is 209205599201. The next prime is 209205599243. The reversal of 209205599234 is 432995502902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 202727764009 + 6477835225 = 450253^2 + 80485^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52301399807 + ... + 52301399810.

Almost surely, 2^209205599234 is an apocalyptic number.

209205599234 is a deficient number, since it is larger than the sum of its proper divisors (104602799620).

209205599234 is a wasteful number, since it uses less digits than its factorization.

209205599234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104602799619.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 209205599234 in words is "two hundred nine billion, two hundred five million, five hundred ninety-nine thousand, two hundred thirty-four".