1444893661 has 2 divisors, whose sum is σ = 1444893662. Its totient is φ = 1444893660.

The previous prime is 1444893617. The next prime is 1444893683. The reversal of 1444893661 is 1663984441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1045293561 + 399600100 = 32331^2 + 19990^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444893661 - 2⁷ = 1444893533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444093661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722446830 + 722446831.

It is an arithmetic number, because the mean of its divisors is an integer number (722446831).

Almost surely, 2^1444893661 is an apocalyptic number.

It is an amenable number.

1444893661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444893661 is an equidigital number, since it uses as much as digits as its factorization.

1444893661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 46.

The square root of 1444893661 is about 38011.7568786290. The cubic root of 1444893661 is about 1130.5209859095.

The spelling of 1444893661 in words is "one billion, four hundred forty-four million, eight hundred ninety-three thousand, six hundred sixty-one".