9997696571 has 4 divisors (see below), whose sum is σ = 10320202944. Its totient is φ = 9675190200.

The previous prime is 9997696547. The next prime is 9997696573. The reversal of 9997696571 is 1756967999.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9997696571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9997696573) 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, 161253140 + ... + 161253201.

It is an arithmetic number, because the mean of its divisors is an integer number (2580050736).

Almost surely, 2^9997696571 is an apocalyptic number.

9997696571 is a deficient number, since it is larger than the sum of its proper divisors (322506373).

9997696571 is a wasteful number, since it uses less digits than its factorization.

9997696571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322506372.

The product of its digits is 57868020, while the sum is 68.

The square root of 9997696571 is about 99988.4821917005. The cubic root of 9997696571 is about 2154.2692577511.

The spelling of 9997696571 in words is "nine billion, nine hundred ninety-seven million, six hundred ninety-six thousand, five hundred seventy-one".