999449 has 8 divisors (see below), whose sum is σ = 1116192. Its totient is φ = 887040.

The previous prime is 999437. The next prime is 999451. The reversal of 999449 is 944999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 999449 - 2⁴ = 999433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584 + ... + 1529.

It is an arithmetic number, because the mean of its divisors is an integer number (139524).

2⁹⁹⁹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

999449 is a deficient number, since it is larger than the sum of its proper divisors (116743).

999449 is a wasteful number, since it uses less digits than its factorization.

999449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167.

The product of its digits is 104976, while the sum is 44.

The square root of 999449 is about 999.7244620394. The cubic root of 999449 is about 99.9816299590.

The spelling of 999449 in words is "nine hundred ninety-nine thousand, four hundred forty-nine".