1444420993 has 2 divisors, whose sum is σ = 1444420994. Its totient is φ = 1444420992.

The previous prime is 1444420987. The next prime is 1444421047. The reversal of 1444420993 is 3990244441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1214383104 + 230037889 = 34848^2 + 15167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444420993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1444420973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722210496 + 722210497.

It is an arithmetic number, because the mean of its divisors is an integer number (722210497).

Almost surely, 2^1444420993 is an apocalyptic number.

It is an amenable number.

1444420993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444420993 is an equidigital number, since it uses as much as digits as its factorization.

1444420993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 1444420993 is about 38005.5389778911. The cubic root of 1444420993 is about 1130.3976967044.

The spelling of 1444420993 in words is "one billion, four hundred forty-four million, four hundred twenty thousand, nine hundred ninety-three".