99996815797 has 2 divisors, whose sum is σ = 99996815798. Its totient is φ = 99996815796.

The previous prime is 99996815767. The next prime is 99996815801. The reversal of 99996815797 is 79751869999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98269083441 + 1727732356 = 313479^2 + 41566^2 .

It is a cyclic number.

It is not a de Polignac number, because 99996815797 - 2⁷ = 99996815669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99996815707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49998407898 + 49998407899.

It is an arithmetic number, because the mean of its divisors is an integer number (49998407899).

Almost surely, 2^99996815797 is an apocalyptic number.

It is an amenable number.

99996815797 is a deficient number, since it is larger than the sum of its proper divisors (1).

99996815797 is an equidigital number, since it uses as much as digits as its factorization.

99996815797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 694416240, while the sum is 79.

The spelling of 99996815797 in words is "ninety-nine billion, nine hundred ninety-six million, eight hundred fifteen thousand, seven hundred ninety-seven".