99744421 has 16 divisors (see below), whose sum is σ = 116847360. Its totient is φ = 83381760.

The previous prime is 99744419. The next prime is 99744439. The reversal of 99744421 is 12444799.

It is not a de Polignac number, because 99744421 - 2¹ = 99744419 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99744401) 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 15 ways as a sum of consecutive naturals, for example, 47175 + ... + 49243.

It is an arithmetic number, because the mean of its divisors is an integer number (7302960).

Almost surely, 2^99744421 is an apocalyptic number.

It is an amenable number.

99744421 is a deficient number, since it is larger than the sum of its proper divisors (17102939).

99744421 is a wasteful number, since it uses less digits than its factorization.

99744421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its digits is 72576, while the sum is 40.

The square root of 99744421 is about 9987.2128744710. The cubic root of 99744421 is about 463.7631151252.

The spelling of 99744421 in words is "ninety-nine million, seven hundred forty-four thousand, four hundred twenty-one".