9945631 has 2 divisors, whose sum is σ = 9945632. Its totient is φ = 9945630.

The previous prime is 9945619. The next prime is 9945647. The reversal of 9945631 is 1365499.

9945631 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1365499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9945631 - 2²¹ = 7848479 is a prime.

It is a super-3 number, since 3×9945631³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9949631) 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, 4972815 + 4972816.

It is an arithmetic number, because the mean of its divisors is an integer number (4972816).

Almost surely, 2^9945631 is an apocalyptic number.

9945631 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945631 is an equidigital number, since it uses as much as digits as its factorization.

9945631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 37.

The square root of 9945631 is about 3153.6694500217. The cubic root of 9945631 is about 215.0523110499.

The spelling of 9945631 in words is "nine million, nine hundred forty-five thousand, six hundred thirty-one".