2659889 has 4 divisors (see below), whose sum is σ = 2663424. Its totient is φ = 2656356.

The previous prime is 2659883. The next prime is 2659903. The reversal of 2659889 is 9889562.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9889562 = 2 ⋅4944781.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2659889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2659883) 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, 137 + ... + 2310.

It is an arithmetic number, because the mean of its divisors is an integer number (665856).

2^2659889 is an apocalyptic number.

It is an amenable number.

2659889 is a deficient number, since it is larger than the sum of its proper divisors (3535).

2659889 is a wasteful number, since it uses less digits than its factorization.

2659889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534.

The product of its digits is 311040, while the sum is 47.

The square root of 2659889 is about 1630.9166134417. The cubic root of 2659889 is about 138.5546709057.

The spelling of 2659889 in words is "two million, six hundred fifty-nine thousand, eight hundred eighty-nine".