9992597081 has 2 divisors, whose sum is σ = 9992597082. Its totient is φ = 9992597080.

The previous prime is 9992597063. The next prime is 9992597099. The reversal of 9992597081 is 1807952999.

9992597081 = 70684² + 70685².

It is a balanced prime because it is at equal distance from previous prime (9992597063) and next prime (9992597099).

It can be written as a sum of positive squares in only one way, i.e., 4996369225 + 4996227856 = 70685^2 + 70684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9992597081 is a prime.

It is a super-2 number, since 2×9992597081² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9992597081.

It is not a weakly prime, because it can be changed into another prime (9992597981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996298540 + 4996298541.

It is an arithmetic number, because the mean of its divisors is an integer number (4996298541).

Almost surely, 2^9992597081 is an apocalyptic number.

9992597081 is the 70685-th centered square number.

It is an amenable number.

9992597081 is a deficient number, since it is larger than the sum of its proper divisors (1).

9992597081 is an equidigital number, since it uses as much as digits as its factorization.

9992597081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 59.

The square root of 9992597081 is about 99962.9785520620. The cubic root of 9992597081 is about 2153.9029219390.

The spelling of 9992597081 in words is "nine billion, nine hundred ninety-two million, five hundred ninety-seven thousand, eighty-one".