99524399 has 4 divisors (see below), whose sum is σ = 107180136. Its totient is φ = 91868664.

The previous prime is 99524389. The next prime is 99524429. The reversal of 99524399 is 99342599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99342599 = 43 ⋅2310293.

It is a cyclic number.

It is not a de Polignac number, because 99524399 - 2¹² = 99520303 is a prime.

It is a super-4 number, since 4×99524399⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99524309) 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 in 3 ways as a sum of consecutive naturals, for example, 3827849 + ... + 3827874.

It is an arithmetic number, because the mean of its divisors is an integer number (26795034).

Almost surely, 2^99524399 is an apocalyptic number.

99524399 is a deficient number, since it is larger than the sum of its proper divisors (7655737).

99524399 is a wasteful number, since it uses less digits than its factorization.

99524399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655736.

The product of its digits is 787320, while the sum is 50.

The square root of 99524399 is about 9976.1916080236. The cubic root of 99524399 is about 463.4218656052.

The spelling of 99524399 in words is "ninety-nine million, five hundred twenty-four thousand, three hundred ninety-nine".