9961573 has 2 divisors, whose sum is σ = 9961574. Its totient is φ = 9961572.

The previous prime is 9961543. The next prime is 9961579. The reversal of 9961573 is 3751699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9941409 + 20164 = 3153^2 + 142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9961573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9961579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980786 + 4980787.

It is an arithmetic number, because the mean of its divisors is an integer number (4980787).

Almost surely, 2^9961573 is an apocalyptic number.

It is an amenable number.

9961573 is a deficient number, since it is larger than the sum of its proper divisors (1).

9961573 is an equidigital number, since it uses as much as digits as its factorization.

9961573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 9961573 is about 3156.1959698346. The cubic root of 9961573 is about 215.1671532280.

The spelling of 9961573 in words is "nine million, nine hundred sixty-one thousand, five hundred seventy-three".