1998335 has 4 divisors (see below), whose sum is σ = 2398008. Its totient is φ = 1598664.

The previous prime is 1998331. The next prime is 1998341. The reversal of 1998335 is 5338991.

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

It is a cyclic number.

It is not a de Polignac number, because 1998335 - 2² = 1998331 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998331) 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, 199829 + ... + 199838.

It is an arithmetic number, because the mean of its divisors is an integer number (599502).

2^1998335 is an apocalyptic number.

1998335 is a deficient number, since it is larger than the sum of its proper divisors (399673).

1998335 is an equidigital number, since it uses as much as digits as its factorization.

1998335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399672.

The product of its digits is 29160, while the sum is 38.

The square root of 1998335 is about 1413.6247734105. The cubic root of 1998335 is about 125.9571324737.

The spelling of 1998335 in words is "one million, nine hundred ninety-eight thousand, three hundred thirty-five".