3544047721 has 2 divisors, whose sum is σ = 3544047722. Its totient is φ = 3544047720.

The previous prime is 3544047719. The next prime is 3544047761. The reversal of 3544047721 is 1277404453.

3544047721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2387299600 + 1156748121 = 48860^2 + 34011^2 .

It is a cyclic number.

It is not a de Polignac number, because 3544047721 - 2¹ = 3544047719 is a prime.

Together with 3544047719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3544047761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1772023860 + 1772023861.

It is an arithmetic number, because the mean of its divisors is an integer number (1772023861).

Almost surely, 2^3544047721 is an apocalyptic number.

It is an amenable number.

3544047721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3544047721 is an equidigital number, since it uses as much as digits as its factorization.

3544047721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 3544047721 is about 59531.9050677870. The cubic root of 3544047721 is about 1524.6372292704.

The spelling of 3544047721 in words is "three billion, five hundred forty-four million, forty-seven thousand, seven hundred twenty-one".