998149 has 8 divisors (see below), whose sum is σ = 1046520. Its totient is φ = 950976.

The previous prime is 998147. The next prime is 998161. The reversal of 998149 is 941899.

It can be written as a sum of positive squares in 4 ways, for example, as 616225 + 381924 = 785^2 + 618^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 998149 - 2¹ = 998147 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 (998147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1707 + ... + 2215.

It is an arithmetic number, because the mean of its divisors is an integer number (130815).

2⁹⁹⁸¹⁴⁹ is an apocalyptic number.

It is an amenable number.

998149 is a deficient number, since it is larger than the sum of its proper divisors (48371).

998149 is a wasteful number, since it uses less digits than its factorization.

998149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599.

The product of its digits is 23328, while the sum is 40.

The square root of 998149 is about 999.0740713280. The cubic root of 998149 is about 99.9382618919.

The spelling of 998149 in words is "nine hundred ninety-eight thousand, one hundred forty-nine".