9641248889 has 2 divisors, whose sum is σ = 9641248890. Its totient is φ = 9641248888.

The previous prime is 9641248873. The next prime is 9641248891. The reversal of 9641248889 is 9888421469.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6269472400 + 3371776489 = 79180^2 + 58067^2 .

It is an emirp because it is prime and its reverse (9888421469) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9641248889 - 2⁴ = 9641248873 is a prime.

Together with 9641248891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9641248829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820624444 + 4820624445.

It is an arithmetic number, because the mean of its divisors is an integer number (4820624445).

Almost surely, 2^9641248889 is an apocalyptic number.

It is an amenable number.

9641248889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9641248889 is an equidigital number, since it uses as much as digits as its factorization.

9641248889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7962624, while the sum is 59.

The square root of 9641248889 is about 98189.8614369121. The cubic root of 9641248889 is about 2128.3567810149.

The spelling of 9641248889 in words is "nine billion, six hundred forty-one million, two hundred forty-eight thousand, eight hundred eighty-nine".