2104709 has 4 divisors (see below), whose sum is σ = 2107980. Its totient is φ = 2101440.

The previous prime is 2104703. The next prime is 2104717. The reversal of 2104709 is 9074012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 422500 + 1682209 = 650^2 + 1297^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104709 - 2¹⁶ = 2039173 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 (2104703) 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, 314 + ... + 2075.

It is an arithmetic number, because the mean of its divisors is an integer number (526995).

2^2104709 is an apocalyptic number.

It is an amenable number.

2104709 is a deficient number, since it is larger than the sum of its proper divisors (3271).

2104709 is an equidigital number, since it uses as much as digits as its factorization.

2104709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2104709 is about 1450.7615241658. The cubic root of 2104709 is about 128.1535632531.

The spelling of 2104709 in words is "two million, one hundred four thousand, seven hundred nine".