998345 has 4 divisors (see below), whose sum is σ = 1198020. Its totient is φ = 798672.

The previous prime is 998329. The next prime is 998353. The reversal of 998345 is 543899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543899 = 83 ⋅6553.

It can be written as a sum of positive squares in 2 ways, for example, as 506944 + 491401 = 712^2 + 701^2 .

It is a cyclic number.

It is not a de Polignac number, because 998345 - 2⁴ = 998329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998299 and 998308.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998345.

It is an unprimeable number.

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, 99830 + ... + 99839.

It is an arithmetic number, because the mean of its divisors is an integer number (299505).

2⁹⁹⁸³⁴⁵ is an apocalyptic number.

It is an amenable number.

998345 is a deficient number, since it is larger than the sum of its proper divisors (199675).

998345 is a wasteful number, since it uses less digits than its factorization.

998345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199674.

The product of its digits is 38880, while the sum is 38.

The square root of 998345 is about 999.1721573383. The cubic root of 998345 is about 99.9448028717.

The spelling of 998345 in words is "nine hundred ninety-eight thousand, three hundred forty-five".