9956641 has 2 divisors, whose sum is σ = 9956642. Its totient is φ = 9956640.

The previous prime is 9956623. The next prime is 9956699. The reversal of 9956641 is 1466599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7134241 + 2822400 = 2671^2 + 1680^2 .

It is an emirp because it is prime and its reverse (1466599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9956641 - 2²³ = 1568033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9956594 and 9956603.

It is not a weakly prime, because it can be changed into another prime (9956041) 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, 4978320 + 4978321.

It is an arithmetic number, because the mean of its divisors is an integer number (4978321).

Almost surely, 2^9956641 is an apocalyptic number.

It is an amenable number.

9956641 is a deficient number, since it is larger than the sum of its proper divisors (1).

9956641 is an equidigital number, since it uses as much as digits as its factorization.

9956641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 9956641 is about 3155.4145527965. The cubic root of 9956641 is about 215.1316374321.

The spelling of 9956641 in words is "nine million, nine hundred fifty-six thousand, six hundred forty-one".