3420047 has 2 divisors, whose sum is σ = 3420048. Its totient is φ = 3420046.

The previous prime is 3420023. The next prime is 3420059. The reversal of 3420047 is 7400243.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7400243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3420047 - 2¹⁴ = 3403663 is a prime.

It is a super-3 number, since 3×3420047³ (a number of 21 digits) contains 333 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3420647) 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, 1710023 + 1710024.

It is an arithmetic number, because the mean of its divisors is an integer number (1710024).

Almost surely, 2^3420047 is an apocalyptic number.

3420047 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420047 is an equidigital number, since it uses as much as digits as its factorization.

3420047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 3420047 is about 1849.3369081917. The cubic root of 3420047 is about 150.6644156302.

The spelling of 3420047 in words is "three million, four hundred twenty thousand, forty-seven".