1998323 has 4 divisors (see below), whose sum is σ = 2010048. Its totient is φ = 1986600.

The previous prime is 1998319. The next prime is 1998329. The reversal of 1998323 is 3238991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3238991 = 7 ⋅462713.

It is a cyclic number.

It is not a de Polignac number, because 1998323 - 2² = 1998319 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5603 + ... + 5948.

It is an arithmetic number, because the mean of its divisors is an integer number (502512).

2^1998323 is an apocalyptic number.

1998323 is a deficient number, since it is larger than the sum of its proper divisors (11725).

1998323 is a wasteful number, since it uses less digits than its factorization.

1998323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11724.

The product of its digits is 11664, while the sum is 35.

The square root of 1998323 is about 1413.6205289964. The cubic root of 1998323 is about 125.9568803490.

The spelling of 1998323 in words is "one million, nine hundred ninety-eight thousand, three hundred twenty-three".