9919573 has 2 divisors, whose sum is σ = 9919574. Its totient is φ = 9919572.

The previous prime is 9919543. The next prime is 9919583. The reversal of 9919573 is 3759199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6260004 + 3659569 = 2502^2 + 1913^2 .

It is an emirp because it is prime and its reverse (3759199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9919573 - 2⁹ = 9919061 is a prime.

9919573 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9919523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4959786 + 4959787.

It is an arithmetic number, because the mean of its divisors is an integer number (4959787).

Almost surely, 2^9919573 is an apocalyptic number.

It is an amenable number.

9919573 is a deficient number, since it is larger than the sum of its proper divisors (1).

9919573 is an equidigital number, since it uses as much as digits as its factorization.

9919573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76545, while the sum is 43.

The square root of 9919573 is about 3149.5353625575. The cubic root of 9919573 is about 214.8643312105.

The spelling of 9919573 in words is "nine million, nine hundred nineteen thousand, five hundred seventy-three".