2018989 has 4 divisors (see below), whose sum is σ = 2307424. Its totient is φ = 1730556.

The previous prime is 2018987. The next prime is 2018993. The reversal of 2018989 is 9898102.

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: 9898102 = 2 ⋅4949051.

It is a cyclic number.

It is not a de Polignac number, because 2018989 - 2¹ = 2018987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018981) 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, 144207 + ... + 144220.

It is an arithmetic number, because the mean of its divisors is an integer number (576856).

2^2018989 is an apocalyptic number.

It is an amenable number.

2018989 is a deficient number, since it is larger than the sum of its proper divisors (288435).

2018989 is an equidigital number, since it uses as much as digits as its factorization.

2018989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288434.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 2018989 is about 1420.9113272826. The cubic root of 2018989 is about 126.3895936594.

The spelling of 2018989 in words is "two million, eighteen thousand, nine hundred eighty-nine".