999955449 has 40 divisors (see below), whose sum is σ = 1517769792. Its totient is φ = 658724400.

The previous prime is 999955433. The next prime is 999955457. The reversal of 999955449 is 944559999.

It is a happy number.

It is not a de Polignac number, because 999955449 - 2⁴ = 999955433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999955469) 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 39 ways as a sum of consecutive naturals, for example, 1987732 + ... + 1988234.

Almost surely, 2^999955449 is an apocalyptic number.

It is an amenable number.

999955449 is a deficient number, since it is larger than the sum of its proper divisors (517814343).

999955449 is an frugal number, since it uses more digits than its factorization.

999955449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 607 counting only the distinct ones).

The product of its digits is 23619600, while the sum is 63.

The square root of 999955449 is about 31622.0721806779. The cubic root of 999955449 is about 999.9851494461.

The spelling of 999955449 in words is "nine hundred ninety-nine million, nine hundred fifty-five thousand, four hundred forty-nine".