9961583 has 2 divisors, whose sum is σ = 9961584. Its totient is φ = 9961582.

The previous prime is 9961579. The next prime is 9961607. The reversal of 9961583 is 3851699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9961583 - 2² = 9961579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9961583.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9961543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980791 + 4980792.

It is an arithmetic number, because the mean of its divisors is an integer number (4980792).

Almost surely, 2^9961583 is an apocalyptic number.

9961583 is a deficient number, since it is larger than the sum of its proper divisors (1).

9961583 is an equidigital number, since it uses as much as digits as its factorization.

9961583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 9961583 is about 3156.1975540197. The cubic root of 9961583 is about 215.1672252271.

The spelling of 9961583 in words is "nine million, nine hundred sixty-one thousand, five hundred eighty-three".