2081659 has 6 divisors (see below), whose sum is σ = 2197860. Its totient is φ = 1966140.

The previous prime is 2081647. The next prime is 2081671. The reversal of 2081659 is 9561802.

It is an interprime number because it is at equal distance from previous prime (2081647) and next prime (2081671).

It is not a de Polignac number, because 2081659 - 2⁵ = 2081627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2081659.

It is not an unprimeable number, because it can be changed into a prime (2081609) 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, 6124 + ... + 6454.

It is an arithmetic number, because the mean of its divisors is an integer number (366310).

2^2081659 is an apocalyptic number.

2081659 is a deficient number, since it is larger than the sum of its proper divisors (116201).

2081659 is an frugal number, since it uses more digits than its factorization.

2081659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2081659 is about 1442.7955503120. The cubic root of 2081659 is about 127.6840146975.

The spelling of 2081659 in words is "two million, eighty-one thousand, six hundred fifty-nine".