1444326661 has 2 divisors, whose sum is σ = 1444326662. Its totient is φ = 1444326660.

The previous prime is 1444326641. The next prime is 1444326683. The reversal of 1444326661 is 1666234441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1439064225 + 5262436 = 37935^2 + 2294^2 .

It is an emirp because it is prime and its reverse (1666234441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1444326661 - 2²⁹ = 907455749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1444326661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444326641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722163330 + 722163331.

It is an arithmetic number, because the mean of its divisors is an integer number (722163331).

Almost surely, 2^1444326661 is an apocalyptic number.

It is an amenable number.

1444326661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444326661 is an equidigital number, since it uses as much as digits as its factorization.

1444326661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The square root of 1444326661 is about 38004.2979279976. The cubic root of 1444326661 is about 1130.3730882287.

The spelling of 1444326661 in words is "one billion, four hundred forty-four million, three hundred twenty-six thousand, six hundred sixty-one".