7444444621 has 2 divisors, whose sum is σ = 7444444622. Its totient is φ = 7444444620.

The previous prime is 7444444597. The next prime is 7444444699. The reversal of 7444444621 is 1264444447.

7444444621 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., 5122264900 + 2322179721 = 71570^2 + 48189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7444444621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7444444421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3722222310 + 3722222311.

It is an arithmetic number, because the mean of its divisors is an integer number (3722222311).

Almost surely, 2^7444444621 is an apocalyptic number.

It is an amenable number.

7444444621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7444444621 is an equidigital number, since it uses as much as digits as its factorization.

7444444621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 344064, while the sum is 40.

The square root of 7444444621 is about 86281.1950601057. The cubic root of 7444444621 is about 1952.5886829864.

The spelling of 7444444621 in words is "seven billion, four hundred forty-four million, four hundred forty-four thousand, six hundred twenty-one".