2061659 has 4 divisors (see below), whose sum is σ = 2065440. Its totient is φ = 2057880.

The previous prime is 2061649. The next prime is 2061667. The reversal of 2061659 is 9561602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061659 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7 and base 15.

It is not an unprimeable number, because it can be changed into a prime (2061629) 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, 899 + ... + 2220.

It is an arithmetic number, because the mean of its divisors is an integer number (516360).

2^2061659 is an apocalyptic number.

2061659 is a deficient number, since it is larger than the sum of its proper divisors (3781).

2061659 is an equidigital number, since it uses as much as digits as its factorization.

2061659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2061659 is about 1435.8478331634. The cubic root of 2061659 is about 127.2737805881.

The spelling of 2061659 in words is "two million, sixty-one thousand, six hundred fifty-nine".