99524609 has 4 divisors (see below), whose sum is σ = 100251204. Its totient is φ = 98798016.

The previous prime is 99524573. The next prime is 99524627. The reversal of 99524609 is 90642599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90642599 = 883 ⋅102653.

It can be written as a sum of positive squares in 2 ways, for example, as 65044225 + 34480384 = 8065^2 + 5872^2 .

It is a cyclic number.

It is not a de Polignac number, because 99524609 - 2²⁰ = 98476033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99524609.

It is not an unprimeable number, because it can be changed into a prime (99524629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363092 + ... + 363365.

It is an arithmetic number, because the mean of its divisors is an integer number (25062801).

Almost surely, 2^99524609 is an apocalyptic number.

It is an amenable number.

99524609 is a deficient number, since it is larger than the sum of its proper divisors (726595).

99524609 is a wasteful number, since it uses less digits than its factorization.

99524609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726594.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 99524609 is about 9976.2021330765. The cubic root of 99524609 is about 463.4221915505.

The spelling of 99524609 in words is "ninety-nine million, five hundred twenty-four thousand, six hundred nine".