7971107391 has 12 divisors (see below), whose sum is σ = 12399500568. Its totient is φ = 4905296784.

The previous prime is 7971107371. The next prime is 7971107467. The reversal of 7971107391 is 1937011797.

It is not a de Polignac number, because 7971107391 - 2¹⁷ = 7970976319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7971107371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34064445 + ... + 34064678.

It is an arithmetic number, because the mean of its divisors is an integer number (1033291714).

Almost surely, 2^7971107391 is an apocalyptic number.

7971107391 is a deficient number, since it is larger than the sum of its proper divisors (4428393177).

7971107391 is a wasteful number, since it uses less digits than its factorization.

7971107391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68129142 (or 68129139 counting only the distinct ones).

The product of its (nonzero) digits is 83349, while the sum is 45.

The square root of 7971107391 is about 89281.0584110650. The cubic root of 7971107391 is about 1997.5893782020.

The spelling of 7971107391 in words is "seven billion, nine hundred seventy-one million, one hundred seven thousand, three hundred ninety-one".