309438931109 has 16 divisors (see below), whose sum is σ = 385919424000. Its totient is φ = 241042850160.

The previous prime is 309438931099. The next prime is 309438931121. The reversal of 309438931109 is 901139834903.

It is not a de Polignac number, because 309438931109 - 2¹⁶ = 309438865573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309438931129) 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 15 ways as a sum of consecutive naturals, for example, 414359 + ... + 889140.

It is an arithmetic number, because the mean of its divisors is an integer number (24119964000).

Almost surely, 2^309438931109 is an apocalyptic number.

It is an amenable number.

309438931109 is a deficient number, since it is larger than the sum of its proper divisors (76480492891).

309438931109 is a wasteful number, since it uses less digits than its factorization.

309438931109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306600.

The product of its (nonzero) digits is 629856, while the sum is 50.

The spelling of 309438931109 in words is "three hundred nine billion, four hundred thirty-eight million, nine hundred thirty-one thousand, one hundred nine".