609966309 has 32 divisors (see below), whose sum is σ = 869806080. Its totient is φ = 379528128.

The previous prime is 609966299. The next prime is 609966353. The reversal of 609966309 is 903669906.

609966309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 609966309 - 2¹³ = 609958117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609966109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 384532 + ... + 386114.

It is an arithmetic number, because the mean of its divisors is an integer number (27181440).

Almost surely, 2^609966309 is an apocalyptic number.

It is an amenable number.

609966309 is a deficient number, since it is larger than the sum of its proper divisors (259839771).

609966309 is a wasteful number, since it uses less digits than its factorization.

609966309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 472392, while the sum is 48.

The square root of 609966309 is about 24697.4960066805. The cubic root of 609966309 is about 848.0769948520.

The spelling of 609966309 in words is "six hundred nine million, nine hundred sixty-six thousand, three hundred nine".