209309339734 has 48 divisors (see below), whose sum is σ = 375276966624. Its totient is φ = 87123928320.

The previous prime is 209309339669. The next prime is 209309339737. The reversal of 209309339734 is 437933903902.

209309339734 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209309339737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 535314 + ... + 839749.

It is an arithmetic number, because the mean of its divisors is an integer number (7818270138).

Almost surely, 2^209309339734 is an apocalyptic number.

209309339734 is a deficient number, since it is larger than the sum of its proper divisors (165967626890).

209309339734 is a wasteful number, since it uses less digits than its factorization.

209309339734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375141 (or 1375130 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 52.

The spelling of 209309339734 in words is "two hundred nine billion, three hundred nine million, three hundred thirty-nine thousand, seven hundred thirty-four".