99523621079 has 2 divisors, whose sum is σ = 99523621080. Its totient is φ = 99523621078.

The previous prime is 99523621073. The next prime is 99523621117. The reversal of 99523621079 is 97012632599.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99523621079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99523621079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99523621073) 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, 49761810539 + 49761810540.

It is an arithmetic number, because the mean of its divisors is an integer number (49761810540).

Almost surely, 2^99523621079 is an apocalyptic number.

99523621079 is a deficient number, since it is larger than the sum of its proper divisors (1).

99523621079 is an equidigital number, since it uses as much as digits as its factorization.

99523621079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 99523621079 in words is "ninety-nine billion, five hundred twenty-three million, six hundred twenty-one thousand, seventy-nine".