998493 has 8 divisors (see below), whose sum is σ = 1339968. Its totient is φ = 661344.

The previous prime is 998471. The next prime is 998497. The reversal of 998493 is 394899.

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

It is not a de Polignac number, because 998493 - 2⁶ = 998429 is a prime.

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 998493.

It is not an unprimeable number, because it can be changed into a prime (998497) 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 7 ways as a sum of consecutive naturals, for example, 496 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (167496).

2⁹⁹⁸⁴⁹³ is an apocalyptic number.

It is an amenable number.

998493 is a deficient number, since it is larger than the sum of its proper divisors (341475).

998493 is a wasteful number, since it uses less digits than its factorization.

998493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163.

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

The square root of 998493 is about 999.2462159048. The cubic root of 998493 is about 99.9497414116.

The spelling of 998493 in words is "nine hundred ninety-eight thousand, four hundred ninety-three".