9944493491 has 2 divisors, whose sum is σ = 9944493492. Its totient is φ = 9944493490.

The previous prime is 9944493487. The next prime is 9944493521. The reversal of 9944493491 is 1943944499.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9944493491 - 2² = 9944493487 is a prime.

It is not a weakly prime, because it can be changed into another prime (9944493991) 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, 4972246745 + 4972246746.

It is an arithmetic number, because the mean of its divisors is an integer number (4972246746).

Almost surely, 2^9944493491 is an apocalyptic number.

9944493491 is a deficient number, since it is larger than the sum of its proper divisors (1).

9944493491 is an equidigital number, since it uses as much as digits as its factorization.

9944493491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 56.

The square root of 9944493491 is about 99722.0812608722. The cubic root of 9944493491 is about 2150.4411203048.

The spelling of 9944493491 in words is "nine billion, nine hundred forty-four million, four hundred ninety-three thousand, four hundred ninety-one".