2160709 has 4 divisors (see below), whose sum is σ = 2172960. Its totient is φ = 2148460.

The previous prime is 2160677. The next prime is 2160721. The reversal of 2160709 is 9070612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2160709 - 2⁵ = 2160677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2160749) 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, 5857 + ... + 6214.

It is an arithmetic number, because the mean of its divisors is an integer number (543240).

2^2160709 is an apocalyptic number.

It is an amenable number.

2160709 is a deficient number, since it is larger than the sum of its proper divisors (12251).

2160709 is a wasteful number, since it uses less digits than its factorization.

2160709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12250.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 2160709 is about 1469.9350325780. The cubic root of 2160709 is about 129.2802233195.

Subtracting 2160709 from its reverse (9070612), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2160709 in words is "two million, one hundred sixty thousand, seven hundred nine".