2943649 has 2 divisors, whose sum is σ = 2943650. Its totient is φ = 2943648.

The previous prime is 2943643. The next prime is 2943653. The reversal of 2943649 is 9463492.

2943649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2050624 + 893025 = 1432^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 2943649 - 2³ = 2943641 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2943641) 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, 1471824 + 1471825.

It is an arithmetic number, because the mean of its divisors is an integer number (1471825).

2^2943649 is an apocalyptic number.

It is an amenable number.

2943649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2943649 is an equidigital number, since it uses as much as digits as its factorization.

2943649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 2943649 is about 1715.7065599921. The cubic root of 2943649 is about 143.3162187365.

The spelling of 2943649 in words is "two million, nine hundred forty-three thousand, six hundred forty-nine".