1998337 has 4 divisors (see below), whose sum is σ = 2180016. Its totient is φ = 1816660.

The previous prime is 1998331. The next prime is 1998341. The reversal of 1998337 is 7338991.

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: 7338991 = 11 ⋅667181.

It is a cyclic number.

It is not a de Polignac number, because 1998337 - 2³ = 1998329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1998337.

It is not an unprimeable number, because it can be changed into a prime (1998331) 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 3 ways as a sum of consecutive naturals, for example, 90823 + ... + 90844.

It is an arithmetic number, because the mean of its divisors is an integer number (545004).

2^1998337 is an apocalyptic number.

It is an amenable number.

1998337 is a deficient number, since it is larger than the sum of its proper divisors (181679).

1998337 is a wasteful number, since it uses less digits than its factorization.

1998337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181678.

The product of its digits is 40824, while the sum is 40.

The square root of 1998337 is about 1413.6254808117. The cubic root of 1998337 is about 125.9571744944.

The spelling of 1998337 in words is "one million, nine hundred ninety-eight thousand, three hundred thirty-seven".