4389947 has 2 divisors, whose sum is σ = 4389948. Its totient is φ = 4389946.

The previous prime is 4389919. The next prime is 4389971. The reversal of 4389947 is 7499834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4389947 - 2⁶ = 4389883 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4389898 and 4389907.

It is not a weakly prime, because it can be changed into another prime (4389977) 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 as a sum of consecutive naturals, namely, 2194973 + 2194974.

It is an arithmetic number, because the mean of its divisors is an integer number (2194974).

Almost surely, 2^4389947 is an apocalyptic number.

4389947 is a deficient number, since it is larger than the sum of its proper divisors (1).

4389947 is an equidigital number, since it uses as much as digits as its factorization.

4389947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 4389947 is about 2095.2200361776. The cubic root of 4389947 is about 163.7393614284.

The spelling of 4389947 in words is "four million, three hundred eighty-nine thousand, nine hundred forty-seven".