2603989 has 4 divisors (see below), whose sum is σ = 2609824. Its totient is φ = 2598156.

The previous prime is 2603981. The next prime is 2604011. The reversal of 2603989 is 9893062.

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 2603989 - 2³ = 2603981 is a prime.

It is a Duffinian number.

2603989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2603981) 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, 2187 + ... + 3160.

It is an arithmetic number, because the mean of its divisors is an integer number (652456).

2^2603989 is an apocalyptic number.

It is an amenable number.

2603989 is a deficient number, since it is larger than the sum of its proper divisors (5835).

2603989 is an equidigital number, since it uses as much as digits as its factorization.

2603989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5834.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 2603989 is about 1613.6880119775. The cubic root of 2603989 is about 137.5771732066.

The spelling of 2603989 in words is "two million, six hundred three thousand, nine hundred eighty-nine".