3420649 has 2 divisors, whose sum is σ = 3420650. Its totient is φ = 3420648.

The previous prime is 3420647. The next prime is 3420653. The reversal of 3420649 is 9460243.

3420649 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 can be written as a sum of positive squares in only one way, i.e., 2155024 + 1265625 = 1468^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 3420649 - 2¹ = 3420647 is a prime.

Together with 3420647, it forms a pair of twin primes.

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710324 + 1710325.

It is an arithmetic number, because the mean of its divisors is an integer number (1710325).

Almost surely, 2^3420649 is an apocalyptic number.

It is an amenable number.

3420649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420649 is an equidigital number, since it uses as much as digits as its factorization.

3420649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 3420649 is about 1849.4996620708. The cubic root of 3420649 is about 150.6732551439.

The spelling of 3420649 in words is "three million, four hundred twenty thousand, six hundred forty-nine".