998943 has 8 divisors (see below), whose sum is σ = 1453056. Its totient is φ = 605400.

The previous prime is 998941. The next prime is 998947. The reversal of 998943 is 349899.

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

It is not a de Polignac number, because 998943 - 2¹ = 998941 is a prime.

998943 is a lucky number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 998895 and 998904.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998943.

It is not an unprimeable number, because it can be changed into a prime (998941) 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, 15103 + ... + 15168.

It is an arithmetic number, because the mean of its divisors is an integer number (181632).

2⁹⁹⁸⁹⁴³ is an apocalyptic number.

998943 is a deficient number, since it is larger than the sum of its proper divisors (454113).

998943 is a wasteful number, since it uses less digits than its factorization.

998943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30285.

The product of its digits is 69984, while the sum is 42.

The square root of 998943 is about 999.4713602700. The cubic root of 998943 is about 99.9647542455.

The spelling of 998943 in words is "nine hundred ninety-eight thousand, nine hundred forty-three".