309438930723 has 32 divisors (see below), whose sum is σ = 453607547904. Its totient is φ = 186458992512.

The previous prime is 309438930677. The next prime is 309438930727. The reversal of 309438930723 is 327039834903.

It is a happy number.

It is not a de Polignac number, because 309438930723 - 2⁹ = 309438930211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (309438930727) 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, 890890 + ... + 1188512.

It is an arithmetic number, because the mean of its divisors is an integer number (14175235872).

Almost surely, 2^309438930723 is an apocalyptic number.

309438930723 is a deficient number, since it is larger than the sum of its proper divisors (144168617181).

309438930723 is a wasteful number, since it uses less digits than its factorization.

309438930723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298195.

The product of its (nonzero) digits is 2939328, while the sum is 51.

The spelling of 309438930723 in words is "three hundred nine billion, four hundred thirty-eight million, nine hundred thirty thousand, seven hundred twenty-three".