2001659 has 8 divisors (see below), whose sum is σ = 2194752. Its totient is φ = 1810440.

The previous prime is 2001653. The next prime is 2001673. The reversal of 2001659 is 9561002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2792 + ... + 3434.

It is an arithmetic number, because the mean of its divisors is an integer number (274344).

2^2001659 is an apocalyptic number.

2001659 is a deficient number, since it is larger than the sum of its proper divisors (193093).

2001659 is a wasteful number, since it uses less digits than its factorization.

2001659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 2001659 is about 1414.7999858637. The cubic root of 2001659 is about 126.0269321786.

The spelling of 2001659 in words is "two million, one thousand, six hundred fifty-nine".