9968909138239 has 4 divisors (see below), whose sum is σ = 9968915545056. Its totient is φ = 9968902731424.

The previous prime is 9968909138189. The next prime is 9968909138269. The reversal of 9968909138239 is 9328319098699.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9968909138239 - 2¹⁵ = 9968909105471 is a prime.

It is a super-2 number, since 2×9968909138239² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9968909138269) 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, 789882 + ... + 4534504.

It is an arithmetic number, because the mean of its divisors is an integer number (2492228886264).

Almost surely, 2^{9968909138239} is an apocalyptic number.

9968909138239 is a deficient number, since it is larger than the sum of its proper divisors (6406817).

9968909138239 is a wasteful number, since it uses less digits than its factorization.

9968909138239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406816.

The product of its (nonzero) digits is 408146688, while the sum is 76.

The spelling of 9968909138239 in words is "nine trillion, nine hundred sixty-eight billion, nine hundred nine million, one hundred thirty-eight thousand, two hundred thirty-nine".