3331649 has 2 divisors, whose sum is σ = 3331650. Its totient is φ = 3331648.

The previous prime is 3331639. The next prime is 3331651. The reversal of 3331649 is 9461333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3330625 + 1024 = 1825^2 + 32^2 .

It is a cyclic number.

It is not a de Polignac number, because 3331649 - 2¹⁶ = 3266113 is a prime.

It is a super-2 number, since 2×3331649² = 22199770118402, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3331651, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3331639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665824 + 1665825.

It is an arithmetic number, because the mean of its divisors is an integer number (1665825).

Almost surely, 2^3331649 is an apocalyptic number.

It is an amenable number.

3331649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3331649 is an equidigital number, since it uses as much as digits as its factorization.

3331649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 29.

The square root of 3331649 is about 1825.2805263849. The cubic root of 3331649 is about 149.3549933815.

The spelling of 3331649 in words is "three million, three hundred thirty-one thousand, six hundred forty-nine".