309768304209 has 16 divisors (see below), whose sum is σ = 508337730432. Its totient is φ = 163394270208.

The previous prime is 309768304187. The next prime is 309768304217. The reversal of 309768304209 is 902403867903.

It is not a de Polignac number, because 309768304209 - 2⁹ = 309768303697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (309768300209) 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 15 ways as a sum of consecutive naturals, for example, 567340944 + ... + 567341489.

It is an arithmetic number, because the mean of its divisors is an integer number (31771108152).

Almost surely, 2^309768304209 is an apocalyptic number.

309768304209 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

309768304209 is a deficient number, since it is larger than the sum of its proper divisors (198569426223).

309768304209 is a wasteful number, since it uses less digits than its factorization.

309768304209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134682456.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 309768304209 in words is "three hundred nine billion, seven hundred sixty-eight million, three hundred four thousand, two hundred nine".