3449821 has 2 divisors, whose sum is σ = 3449822. Its totient is φ = 3449820.

The previous prime is 3449807. The next prime is 3449879. The reversal of 3449821 is 1289443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3404025 + 45796 = 1845^2 + 214^2 .

It is a cyclic number.

It is not a de Polignac number, because 3449821 - 2⁹ = 3449309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3449801) 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, 1724910 + 1724911.

It is an arithmetic number, because the mean of its divisors is an integer number (1724911).

Almost surely, 2^3449821 is an apocalyptic number.

It is an amenable number.

3449821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3449821 is an equidigital number, since it uses as much as digits as its factorization.

3449821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 3449821 is about 1857.3693762954. The cubic root of 3449821 is about 151.1003674639.

The spelling of 3449821 in words is "three million, four hundred forty-nine thousand, eight hundred twenty-one".