9138793237971 has 4 divisors (see below), whose sum is σ = 12185057650632. Its totient is φ = 6092528825312.

The previous prime is 9138793237967. The next prime is 9138793237979. The reversal of 9138793237971 is 1797323978319.

It is a happy number.

9138793237971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9138793237971 - 2² = 9138793237967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9138793237896 and 9138793237905.

It is not an unprimeable number, because it can be changed into a prime (9138793237979) 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, 1523132206326 + ... + 1523132206331.

It is an arithmetic number, because the mean of its divisors is an integer number (3046264412658).

Almost surely, 2^{9138793237971} is an apocalyptic number.

9138793237971 is a deficient number, since it is larger than the sum of its proper divisors (3046264412661).

9138793237971 is a wasteful number, since it uses less digits than its factorization.

9138793237971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046264412660.

The product of its digits is 108020304, while the sum is 69.

The spelling of 9138793237971 in words is "nine trillion, one hundred thirty-eight billion, seven hundred ninety-three million, two hundred thirty-seven thousand, nine hundred seventy-one".