9691881697 has 16 divisors (see below), whose sum is σ = 9897753600. Its totient is φ = 9488466000.

The previous prime is 9691881653. The next prime is 9691881733. The reversal of 9691881697 is 7961881969.

It is a cyclic number.

It is not a de Polignac number, because 9691881697 - 2⁷ = 9691881569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9691881097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7506622 + ... + 7507912.

It is an arithmetic number, because the mean of its divisors is an integer number (618609600).

Almost surely, 2^9691881697 is an apocalyptic number.

It is an amenable number.

9691881697 is a deficient number, since it is larger than the sum of its proper divisors (205871903).

9691881697 is a wasteful number, since it uses less digits than its factorization.

9691881697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124.

The product of its digits is 11757312, while the sum is 64.

The square root of 9691881697 is about 98447.3549517711. The cubic root of 9691881697 is about 2132.0760979219.

The spelling of 9691881697 in words is "nine billion, six hundred ninety-one million, eight hundred eighty-one thousand, six hundred ninety-seven".