998229 has 4 divisors (see below), whose sum is σ = 1330976. Its totient is φ = 665484.

The previous prime is 998219. The next prime is 998237. The reversal of 998229 is 922899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 922899 = 3 ⋅307633.

It is not a de Polignac number, because 998229 - 2⁴ = 998213 is a prime.

It is a super-2 number, since 2×998229² = 1992922272882, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998219) 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, 166369 + ... + 166374.

It is an arithmetic number, because the mean of its divisors is an integer number (332744).

2⁹⁹⁸²²⁹ is an apocalyptic number.

It is an amenable number.

998229 is a deficient number, since it is larger than the sum of its proper divisors (332747).

998229 is a wasteful number, since it uses less digits than its factorization.

998229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332746.

The product of its digits is 23328, while the sum is 39.

The square root of 998229 is about 999.1141075973. The cubic root of 998229 is about 99.9409317830.

It can be divided in two parts, 9982 and 29, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 998229 in words is "nine hundred ninety-eight thousand, two hundred twenty-nine".