9685699897 has 2 divisors, whose sum is σ = 9685699898. Its totient is φ = 9685699896.

The previous prime is 9685699883. The next prime is 9685699909. The reversal of 9685699897 is 7989965869.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6629379241 + 3056320656 = 81421^2 + 55284^2 .

It is a cyclic number.

It is not a de Polignac number, because 9685699897 - 2⁷ = 9685699769 is a prime.

It is not a weakly prime, because it can be changed into another prime (9685699847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4842849948 + 4842849949.

It is an arithmetic number, because the mean of its divisors is an integer number (4842849949).

Almost surely, 2^9685699897 is an apocalyptic number.

It is an amenable number.

9685699897 is a deficient number, since it is larger than the sum of its proper divisors (1).

9685699897 is an equidigital number, since it uses as much as digits as its factorization.

9685699897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529079040, while the sum is 76.

The square root of 9685699897 is about 98415.9534679210. The cubic root of 9685699897 is about 2131.6226988244.

The spelling of 9685699897 in words is "nine billion, six hundred eighty-five million, six hundred ninety-nine thousand, eight hundred ninety-seven".