99449521 has 4 divisors (see below), whose sum is σ = 100647792. Its totient is φ = 98251252.

The previous prime is 99449503. The next prime is 99449527. The reversal of 99449521 is 12594499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99449521 - 2¹⁵ = 99416753 is a prime.

It is a super-3 number, since 3×99449521³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (99449527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599011 + ... + 599176.

It is an arithmetic number, because the mean of its divisors is an integer number (25161948).

Almost surely, 2^99449521 is an apocalyptic number.

It is an amenable number.

99449521 is a deficient number, since it is larger than the sum of its proper divisors (1198271).

99449521 is a wasteful number, since it uses less digits than its factorization.

99449521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198270.

The product of its digits is 116640, while the sum is 43.

The square root of 99449521 is about 9972.4380669924. The cubic root of 99449521 is about 463.3056166963.

The spelling of 99449521 in words is "ninety-nine million, four hundred forty-nine thousand, five hundred twenty-one".