999998449 has 4 divisors (see below), whose sum is σ = 1002784320. Its totient is φ = 997212580.

The previous prime is 999998423. The next prime is 999998459. The reversal of 999998449 is 944899999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 999998449 - 2²³ = 991609841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999998459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1392397 + ... + 1393114.

It is an arithmetic number, because the mean of its divisors is an integer number (250696080).

Almost surely, 2^999998449 is an apocalyptic number.

It is an amenable number.

999998449 is a deficient number, since it is larger than the sum of its proper divisors (2785871).

999998449 is a wasteful number, since it uses less digits than its factorization.

999998449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785870.

The product of its digits is 68024448, while the sum is 70.

The square root of 999998449 is about 31622.7520782110. The cubic root of 999998449 is about 999.9994829997. Note that the first 3 decimals are identical.

The spelling of 999998449 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, four hundred forty-nine".