3964549 has 2 divisors, whose sum is σ = 3964550. Its totient is φ = 3964548.

The previous prime is 3964531. The next prime is 3964589. The reversal of 3964549 is 9454693.

It is an a-pointer prime, because the next prime (3964589) can be obtained adding 3964549 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2160900 + 1803649 = 1470^2 + 1343^2 .

It is an emirp because it is prime and its reverse (9454693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3964549 - 2⁵ = 3964517 is a prime.

It is a Chen prime.

3964549 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3964589) 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, 1982274 + 1982275.

It is an arithmetic number, because the mean of its divisors is an integer number (1982275).

Almost surely, 2^3964549 is an apocalyptic number.

It is an amenable number.

3964549 is a deficient number, since it is larger than the sum of its proper divisors (1).

3964549 is an equidigital number, since it uses as much as digits as its factorization.

3964549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 40.

The square root of 3964549 is about 1991.1175254113. The cubic root of 3964549 is about 158.2697549600.

The spelling of 3964549 in words is "three million, nine hundred sixty-four thousand, five hundred forty-nine".