1998029 has 4 divisors (see below), whose sum is σ = 2179680. Its totient is φ = 1816380.

The previous prime is 1998023. The next prime is 1998041. The reversal of 1998029 is 9208991.

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.

It is a cyclic number.

It is not a de Polignac number, because 1998029 - 2⁸ = 1997773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1997983 and 1998001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998023) 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, 90809 + ... + 90830.

It is an arithmetic number, because the mean of its divisors is an integer number (544920).

2^1998029 is an apocalyptic number.

It is an amenable number.

1998029 is a deficient number, since it is larger than the sum of its proper divisors (181651).

1998029 is a wasteful number, since it uses less digits than its factorization.

1998029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181650.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1998029 is about 1413.5165368682. The cubic root of 1998029 is about 125.9507029795.

Subtracting from 1998029 its sum of digits (38), we obtain a palindrome (1997991).

It can be divided in two parts, 199 and 8029, that added together give a palindrome (8228).

The spelling of 1998029 in words is "one million, nine hundred ninety-eight thousand, twenty-nine".