99444391 has 4 divisors (see below), whose sum is σ = 99692784. Its totient is φ = 99196000.

The previous prime is 99444383. The next prime is 99444413. The reversal of 99444391 is 19344499.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99444391 - 2³ = 99444383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99444491) 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, 123595 + ... + 124396.

It is an arithmetic number, because the mean of its divisors is an integer number (24923196).

Almost surely, 2^99444391 is an apocalyptic number.

99444391 is a deficient number, since it is larger than the sum of its proper divisors (248393).

99444391 is a wasteful number, since it uses less digits than its factorization.

99444391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248392.

The product of its digits is 139968, while the sum is 43.

The square root of 99444391 is about 9972.1808547579. The cubic root of 99444391 is about 463.2976501800.

The spelling of 99444391 in words is "ninety-nine million, four hundred forty-four thousand, three hundred ninety-one".