2439947 has 4 divisors (see below), whose sum is σ = 2455080. Its totient is φ = 2424816.

The previous prime is 2439929. The next prime is 2439953. The reversal of 2439947 is 7499342.

2439947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2439947 - 2¹⁴ = 2423563 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 2439947.

It is not an unprimeable number, because it can be changed into a prime (2439907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7322 + ... + 7647.

It is an arithmetic number, because the mean of its divisors is an integer number (613770).

2^2439947 is an apocalyptic number.

2439947 is a deficient number, since it is larger than the sum of its proper divisors (15133).

2439947 is a wasteful number, since it uses less digits than its factorization.

2439947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15132.

The product of its digits is 54432, while the sum is 38.

The square root of 2439947 is about 1562.0329702026. The cubic root of 2439947 is about 134.6253351849.

The spelling of 2439947 in words is "two million, four hundred thirty-nine thousand, nine hundred forty-seven".