2706409 has 4 divisors (see below), whose sum is σ = 2716740. Its totient is φ = 2696080.

The previous prime is 2706391. The next prime is 2706413. The reversal of 2706409 is 9046072.

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 760384 + 1946025 = 872^2 + 1395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2706409 - 2¹³ = 2698217 is a prime.

It is a Duffinian number.

2706409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2706419) 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, 4762 + ... + 5299.

It is an arithmetic number, because the mean of its divisors is an integer number (679185).

2^2706409 is an apocalyptic number.

It is an amenable number.

2706409 is a deficient number, since it is larger than the sum of its proper divisors (10331).

2706409 is a wasteful number, since it uses less digits than its factorization.

2706409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 2706409 is about 1645.1167131848. The cubic root of 2706409 is about 139.3577555129.

The spelling of 2706409 in words is "two million, seven hundred six thousand, four hundred nine".