9865208097 has 12 divisors (see below), whose sum is σ = 14251421184. Its totient is φ = 6576031800.

The previous prime is 9865208083. The next prime is 9865208099. The reversal of 9865208097 is 7908025689.

It is a happy number.

It is not a de Polignac number, because 9865208097 - 2⁶ = 9865208033 is a prime.

It is a super-2 number, since 2×9865208097² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9865208099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22468 + ... + 142250.

It is an arithmetic number, because the mean of its divisors is an integer number (1187618432).

Almost surely, 2^9865208097 is an apocalyptic number.

It is an amenable number.

9865208097 is a deficient number, since it is larger than the sum of its proper divisors (4386213087).

9865208097 is a wasteful number, since it uses less digits than its factorization.

9865208097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128940 (or 128937 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 9865208097 is about 99323.7539413407. The cubic root of 9865208097 is about 2144.7108567499.

The spelling of 9865208097 in words is "nine billion, eight hundred sixty-five million, two hundred eight thousand, ninety-seven".