998369 has 4 divisors (see below), whose sum is σ = 1001220. Its totient is φ = 995520.

The previous prime is 998353. The next prime is 998377. The reversal of 998369 is 963899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 508369 + 490000 = 713^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 998369 - 2⁴ = 998353 is a prime.

It is a super-2 number, since 2×998369² = 1993481320322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (998329) 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, 812 + ... + 1629.

It is an arithmetic number, because the mean of its divisors is an integer number (250305).

2⁹⁹⁸³⁶⁹ is an apocalyptic number.

It is an amenable number.

998369 is a deficient number, since it is larger than the sum of its proper divisors (2851).

998369 is a wasteful number, since it uses less digits than its factorization.

998369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850.

The product of its digits is 104976, while the sum is 44.

The square root of 998369 is about 999.1841672084. The cubic root of 998369 is about 99.9456037492.

The spelling of 998369 in words is "nine hundred ninety-eight thousand, three hundred sixty-nine".