99178764949469 has 2 divisors, whose sum is σ = 99178764949470. Its totient is φ = 99178764949468.

The previous prime is 99178764949427. The next prime is 99178764949471. The reversal of 99178764949469 is 96494946787199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88149471552025 + 11029293397444 = 9388795^2 + 3321038^2 .

It is an emirp because it is prime and its reverse (96494946787199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99178764949469 - 2²⁰ = 99178763900893 is a prime.

It is a super-2 number, since 2×99178764949469² (a number of 29 digits) contains 22 as substring.

Together with 99178764949471, 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 (99178764919469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49589382474734 + 49589382474735.

It is an arithmetic number, because the mean of its divisors is an integer number (49589382474735).

Almost surely, 2^{99178764949469} is an apocalyptic number.

It is an amenable number.

99178764949469 is a deficient number, since it is larger than the sum of its proper divisors (1).

99178764949469 is an equidigital number, since it uses as much as digits as its factorization.

99178764949469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53331167232, while the sum is 92.

The spelling of 99178764949469 in words is "ninety-nine trillion, one hundred seventy-eight billion, seven hundred sixty-four million, nine hundred forty-nine thousand, four hundred sixty-nine".