3447139 has 2 divisors, whose sum is σ = 3447140. Its totient is φ = 3447138.

The previous prime is 3447131. The next prime is 3447203. The reversal of 3447139 is 9317443.

3447139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (9317443) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3447139 - 2³ = 3447131 is a prime.

3447139 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3447139.

It is not a weakly prime, because it can be changed into another prime (3447131) 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 as a sum of consecutive naturals, namely, 1723569 + 1723570.

It is an arithmetic number, because the mean of its divisors is an integer number (1723570).

Almost surely, 2^3447139 is an apocalyptic number.

3447139 is a deficient number, since it is larger than the sum of its proper divisors (1).

3447139 is an equidigital number, since it uses as much as digits as its factorization.

3447139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 3447139 is about 1856.6472470558. The cubic root of 3447139 is about 151.0612005768.

The spelling of 3447139 in words is "three million, four hundred forty-seven thousand, one hundred thirty-nine".