8691319791 has 64 divisors (see below), whose sum is σ = 16113945600. Its totient is φ = 4497897600.

The previous prime is 8691319781. The next prime is 8691319799. The reversal of 8691319791 is 1979131968.

It is a happy number.

It is not a de Polignac number, because 8691319791 - 2²¹ = 8689222639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8691319799) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 551481 + ... + 567021.

It is an arithmetic number, because the mean of its divisors is an integer number (251780400).

Almost surely, 2^8691319791 is an apocalyptic number.

8691319791 is a deficient number, since it is larger than the sum of its proper divisors (7422625809).

8691319791 is a wasteful number, since it uses less digits than its factorization.

8691319791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15837 (or 15831 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 8691319791 is about 93227.2481144864. The cubic root of 8691319791 is about 2056.0258781099.

The spelling of 8691319791 in words is "eight billion, six hundred ninety-one million, three hundred nineteen thousand, seven hundred ninety-one".