2709947 has 4 divisors (see below), whose sum is σ = 2716560. Its totient is φ = 2703336.

The previous prime is 2709923. The next prime is 2710003. The reversal of 2709947 is 7499072.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2709947 - 2¹² = 2705851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2709947.

It is not an unprimeable number, because it can be changed into a prime (2709907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2648 + ... + 3525.

It is an arithmetic number, because the mean of its divisors is an integer number (679140).

2^2709947 is an apocalyptic number.

2709947 is a deficient number, since it is larger than the sum of its proper divisors (6613).

2709947 is an equidigital number, since it uses as much as digits as its factorization.

2709947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6612.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 2709947 is about 1646.1916656331. The cubic root of 2709947 is about 139.4184550163.

The spelling of 2709947 in words is "two million, seven hundred nine thousand, nine hundred forty-seven".