2689859 has 4 divisors (see below), whose sum is σ = 2848104. Its totient is φ = 2531616.

The previous prime is 2689807. The next prime is 2689861. The reversal of 2689859 is 9589862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9589862 = 2 ⋅4794931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2689859 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 6² + 8 + 9⁵ + 8⁷ + 5³ + 9⁶ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2689889) 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, 79097 + ... + 79130.

It is an arithmetic number, because the mean of its divisors is an integer number (712026).

2^2689859 is an apocalyptic number.

2689859 is a deficient number, since it is larger than the sum of its proper divisors (158245).

2689859 is a wasteful number, since it uses less digits than its factorization.

2689859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158244.

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

The square root of 2689859 is about 1640.0789615137. The cubic root of 2689859 is about 139.0731116508.

The spelling of 2689859 in words is "two million, six hundred eighty-nine thousand, eight hundred fifty-nine".