99523421519 has 2 divisors, whose sum is σ = 99523421520. Its totient is φ = 99523421518.

The previous prime is 99523421483. The next prime is 99523421531. The reversal of 99523421519 is 91512432599.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99523421519 - 2¹² = 99523417423 is a prime.

It is a super-2 number, since 2×99523421519² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99523421549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49761710759 + 49761710760.

It is an arithmetic number, because the mean of its divisors is an integer number (49761710760).

Almost surely, 2^99523421519 is an apocalyptic number.

99523421519 is a deficient number, since it is larger than the sum of its proper divisors (1).

99523421519 is an equidigital number, since it uses as much as digits as its factorization.

99523421519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 50.

The spelling of 99523421519 in words is "ninety-nine billion, five hundred twenty-three million, four hundred twenty-one thousand, five hundred nineteen".