999944455 has 16 divisors (see below), whose sum is σ = 1215396000. Its totient is φ = 789713280.

The previous prime is 999944453. The next prime is 999944467. The reversal of 999944455 is 554449999.

It is not a de Polignac number, because 999944455 - 2¹ = 999944453 is a prime.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999944455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999944453) 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, 121821 + ... + 129769.

It is an arithmetic number, because the mean of its divisors is an integer number (75962250).

Almost surely, 2^999944455 is an apocalyptic number.

999944455 is a deficient number, since it is larger than the sum of its proper divisors (215451545).

999944455 is a wasteful number, since it uses less digits than its factorization.

999944455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8274.

The product of its digits is 10497600, while the sum is 58.

The square root of 999944455 is about 31621.8983459248. The cubic root of 999944455 is about 999.9814846572.

The spelling of 999944455 in words is "nine hundred ninety-nine million, nine hundred forty-four thousand, four hundred fifty-five".