8697640571 has 4 divisors (see below), whose sum is σ = 8700578952. Its totient is φ = 8694702192.

The previous prime is 8697640543. The next prime is 8697640591. The reversal of 8697640571 is 1750467968.

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 8697640571 - 2¹⁰ = 8697639547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8697640541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464746 + ... + 1470671.

It is an arithmetic number, because the mean of its divisors is an integer number (2175144738).

Almost surely, 2^8697640571 is an apocalyptic number.

8697640571 is a deficient number, since it is larger than the sum of its proper divisors (2938381).

8697640571 is a wasteful number, since it uses less digits than its factorization.

8697640571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938380.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 8697640571 is about 93261.1418062207. The cubic root of 8697640571 is about 2056.5241736681.

The spelling of 8697640571 in words is "eight billion, six hundred ninety-seven million, six hundred forty thousand, five hundred seventy-one".