2170659 has 4 divisors (see below), whose sum is σ = 2894216. Its totient is φ = 1447104.

The previous prime is 2170657. The next prime is 2170667. The reversal of 2170659 is 9560712.

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

It is not a de Polignac number, because 2170659 - 2¹ = 2170657 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2170657) 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, 361774 + ... + 361779.

It is an arithmetic number, because the mean of its divisors is an integer number (723554).

2^2170659 is an apocalyptic number.

2170659 is a deficient number, since it is larger than the sum of its proper divisors (723557).

2170659 is an equidigital number, since it uses as much as digits as its factorization.

2170659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723556.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 2170659 is about 1473.3156484610. The cubic root of 2170659 is about 129.4783633346.

The spelling of 2170659 in words is "two million, one hundred seventy thousand, six hundred fifty-nine".