3956549 has 2 divisors, whose sum is σ = 3956550. Its totient is φ = 3956548.

The previous prime is 3956543. The next prime is 3956569. The reversal of 3956549 is 9456593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3441025 + 515524 = 1855^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 3956549 - 2¹² = 3952453 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3956543) 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, 1978274 + 1978275.

It is an arithmetic number, because the mean of its divisors is an integer number (1978275).

Almost surely, 2^3956549 is an apocalyptic number.

It is an amenable number.

3956549 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956549 is an equidigital number, since it uses as much as digits as its factorization.

3956549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 41.

The square root of 3956549 is about 1989.1075888448. The cubic root of 3956549 is about 158.1632266050.

The spelling of 3956549 in words is "three million, nine hundred fifty-six thousand, five hundred forty-nine".