2018789 has 4 divisors (see below), whose sum is σ = 2037420. Its totient is φ = 2000160.

The previous prime is 2018773. The next prime is 2018827. The reversal of 2018789 is 9878102.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1809025 + 209764 = 1345^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 2018789 - 2⁴ = 2018773 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 (2018729) 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, 9152 + ... + 9369.

It is an arithmetic number, because the mean of its divisors is an integer number (509355).

2^2018789 is an apocalyptic number.

It is an amenable number.

2018789 is a deficient number, since it is larger than the sum of its proper divisors (18631).

2018789 is a wasteful number, since it uses less digits than its factorization.

2018789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18630.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2018789 is about 1420.8409481712. The cubic root of 2018789 is about 126.3854201591.

The spelling of 2018789 in words is "two million, eighteen thousand, seven hundred eighty-nine".