2618689 has 4 divisors (see below), whose sum is σ = 2630656. Its totient is φ = 2606724.

The previous prime is 2618659. The next prime is 2618717. The reversal of 2618689 is 9868162.

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 2618689 - 2¹³ = 2610497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2618659) 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, 5649 + ... + 6094.

It is an arithmetic number, because the mean of its divisors is an integer number (657664).

2^2618689 is an apocalyptic number.

It is an amenable number.

2618689 is a deficient number, since it is larger than the sum of its proper divisors (11967).

2618689 is a wasteful number, since it uses less digits than its factorization.

2618689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11966.

The product of its digits is 41472, while the sum is 40.

The square root of 2618689 is about 1618.2363856989. The cubic root of 2618689 is about 137.8355704526.

Adding to 2618689 its product of digits (41472), we get a square (2660161 = 1631²).

The spelling of 2618689 in words is "two million, six hundred eighteen thousand, six hundred eighty-nine".