2159909 has 8 divisors (see below), whose sum is σ = 2231712. Its totient is φ = 2089360.

The previous prime is 2159903. The next prime is 2159923. The reversal of 2159909 is 9099512.

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

It is a cyclic number.

It is not a de Polignac number, because 2159909 - 2⁴ = 2159893 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 (2159903) 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, 4154 + ... + 4644.

It is an arithmetic number, because the mean of its divisors is an integer number (278964).

2^2159909 is an apocalyptic number.

It is an amenable number.

2159909 is a deficient number, since it is larger than the sum of its proper divisors (71803).

2159909 is an equidigital number, since it uses as much as digits as its factorization.

2159909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 2159909 is about 1469.6628865151. The cubic root of 2159909 is about 129.2642660657.

The spelling of 2159909 in words is "two million, one hundred fifty-nine thousand, nine hundred nine".