99208991597 has 2 divisors, whose sum is σ = 99208991598. Its totient is φ = 99208991596.

The previous prime is 99208991477. The next prime is 99208991599. The reversal of 99208991597 is 79519980299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79264208521 + 19944783076 = 281539^2 + 141226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99208991597 is a prime.

It is a super-2 number, since 2×99208991597² (a number of 23 digits) contains 22 as substring.

Together with 99208991599, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99208991599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49604495798 + 49604495799.

It is an arithmetic number, because the mean of its divisors is an integer number (49604495799).

Almost surely, 2^99208991597 is an apocalyptic number.

It is an amenable number.

99208991597 is a deficient number, since it is larger than the sum of its proper divisors (1).

99208991597 is an equidigital number, since it uses as much as digits as its factorization.

99208991597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33067440, while the sum is 68.

The spelling of 99208991597 in words is "ninety-nine billion, two hundred eight million, nine hundred ninety-one thousand, five hundred ninety-seven".