998447 has 4 divisors (see below), whose sum is σ = 1000680. Its totient is φ = 996216.

The previous prime is 998443. The next prime is 998471. The reversal of 998447 is 744899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744899 = 31 ⋅24029.

It is a cyclic number.

It is not a de Polignac number, because 998447 - 2² = 998443 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 (998443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (250170).

2⁹⁹⁸⁴⁴⁷ is an apocalyptic number.

998447 is a deficient number, since it is larger than the sum of its proper divisors (2233).

998447 is a wasteful number, since it uses less digits than its factorization.

998447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232.

The product of its digits is 72576, while the sum is 41.

The square root of 998447 is about 999.2231982896. The cubic root of 998447 is about 99.9482065123.

The spelling of 998447 in words is "nine hundred ninety-eight thousand, four hundred forty-seven".