1998327 has 4 divisors (see below), whose sum is σ = 2664440. Its totient is φ = 1332216.

The previous prime is 1998319. The next prime is 1998329. The reversal of 1998327 is 7238991.

1998327 is nontrivially palindromic in base 11.

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

It is not a de Polignac number, because 1998327 - 2³ = 1998319 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333052 + ... + 333057.

It is an arithmetic number, because the mean of its divisors is an integer number (666110).

2^1998327 is an apocalyptic number.

1998327 is a deficient number, since it is larger than the sum of its proper divisors (666113).

1998327 is an equidigital number, since it uses as much as digits as its factorization.

1998327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666112.

The product of its digits is 27216, while the sum is 39.

The square root of 1998327 is about 1413.6219438025. The cubic root of 1998327 is about 125.9569643907.

It can be divided in two parts, 19 and 98327, that added together give a triangular number (98346 = T₄₄₃).

The spelling of 1998327 in words is "one million, nine hundred ninety-eight thousand, three hundred twenty-seven".