2659891 has 6 divisors (see below), whose sum is σ = 2880420. Its totient is φ = 2455128.

The previous prime is 2659883. The next prime is 2659903. The reversal of 2659891 is 1989562.

It is not a de Polignac number, because 2659891 - 2³ = 2659883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2659801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7701 + ... + 8038.

It is an arithmetic number, because the mean of its divisors is an integer number (480070).

2^2659891 is an apocalyptic number.

2659891 is a deficient number, since it is larger than the sum of its proper divisors (220529).

2659891 is a wasteful number, since it uses less digits than its factorization.

2659891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15765 (or 15752 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 2659891 is about 1630.9172265937. The cubic root of 2659891 is about 138.5547056327.

The spelling of 2659891 in words is "two million, six hundred fifty-nine thousand, eight hundred ninety-one".