9651621241 has 2 divisors, whose sum is σ = 9651621242. Its totient is φ = 9651621240.

The previous prime is 9651621209. The next prime is 9651621253. The reversal of 9651621241 is 1421261569.

9651621241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9521661241 + 129960000 = 97579^2 + 11400^2 .

It is a cyclic number.

It is not a de Polignac number, because 9651621241 - 2⁵ = 9651621209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9651621241.

It is not a weakly prime, because it can be changed into another prime (9651625241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4825810620 + 4825810621.

It is an arithmetic number, because the mean of its divisors is an integer number (4825810621).

Almost surely, 2^9651621241 is an apocalyptic number.

It is an amenable number.

9651621241 is a deficient number, since it is larger than the sum of its proper divisors (1).

9651621241 is an equidigital number, since it uses as much as digits as its factorization.

9651621241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 9651621241 is about 98242.6650748034. The cubic root of 9651621241 is about 2129.1197580245.

The spelling of 9651621241 in words is "nine billion, six hundred fifty-one million, six hundred twenty-one thousand, two hundred forty-one".