9129807139909 has 4 divisors (see below), whose sum is σ = 9424317047680. Its totient is φ = 8835297232140.

The previous prime is 9129807139897. The next prime is 9129807139939. The reversal of 9129807139909 is 9099317089219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9129807139909 - 2²³ = 9129798751301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9129807139939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147254953839 + ... + 147254953900.

It is an arithmetic number, because the mean of its divisors is an integer number (2356079261920).

Almost surely, 2^{9129807139909} is an apocalyptic number.

It is an amenable number.

9129807139909 is a deficient number, since it is larger than the sum of its proper divisors (294509907771).

9129807139909 is a wasteful number, since it uses less digits than its factorization.

9129807139909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294509907770.

The product of its (nonzero) digits is 19840464, while the sum is 67.

The spelling of 9129807139909 in words is "nine trillion, one hundred twenty-nine billion, eight hundred seven million, one hundred thirty-nine thousand, nine hundred nine".