9961088897 has 2 divisors, whose sum is σ = 9961088898. Its totient is φ = 9961088896.

The previous prime is 9961088873. The next prime is 9961088927. The reversal of 9961088897 is 7988801699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5650378561 + 4310710336 = 75169^2 + 65656^2 .

It is an emirp because it is prime and its reverse (7988801699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9961088897 - 2²² = 9956894593 is a prime.

It is not a weakly prime, because it can be changed into another prime (9961088807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980544448 + 4980544449.

It is an arithmetic number, because the mean of its divisors is an integer number (4980544449).

Almost surely, 2^9961088897 is an apocalyptic number.

It is an amenable number.

9961088897 is a deficient number, since it is larger than the sum of its proper divisors (1).

9961088897 is an equidigital number, since it uses as much as digits as its factorization.

9961088897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 65.

The square root of 9961088897 is about 99805.2548566457. The cubic root of 9961088897 is about 2151.6366767572.

The spelling of 9961088897 in words is "nine billion, nine hundred sixty-one million, eighty-eight thousand, eight hundred ninety-seven".