309138923753 has 16 divisors (see below), whose sum is σ = 338025864960. Its totient is φ = 280383321600.

The previous prime is 309138923747. The next prime is 309138923773. The reversal of 309138923753 is 357329831903.

It is a cyclic number.

It is not a de Polignac number, because 309138923753 - 2⁶ = 309138923689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 309138923695 and 309138923704.

It is not an unprimeable number, because it can be changed into a prime (309138923713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8371376 + ... + 8408222.

It is an arithmetic number, because the mean of its divisors is an integer number (21126616560).

Almost surely, 2^309138923753 is an apocalyptic number.

It is an amenable number.

309138923753 is a deficient number, since it is larger than the sum of its proper divisors (28886941207).

309138923753 is a wasteful number, since it uses less digits than its factorization.

309138923753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38608.

The product of its (nonzero) digits is 3674160, while the sum is 53.

The spelling of 309138923753 in words is "three hundred nine billion, one hundred thirty-eight million, nine hundred twenty-three thousand, seven hundred fifty-three".