9628407809 has 2 divisors, whose sum is σ = 9628407810. Its totient is φ = 9628407808.

The previous prime is 9628407787. The next prime is 9628407847. The reversal of 9628407809 is 9087048269.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6900957184 + 2727450625 = 83072^2 + 52225^2 .

It is a cyclic number.

It is not a de Polignac number, because 9628407809 - 2³² = 5333440513 is a prime.

It is a super-3 number, since 3×9628407809³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (9628407409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4814203904 + 4814203905.

It is an arithmetic number, because the mean of its divisors is an integer number (4814203905).

Almost surely, 2^9628407809 is an apocalyptic number.

It is an amenable number.

9628407809 is a deficient number, since it is larger than the sum of its proper divisors (1).

9628407809 is an equidigital number, since it uses as much as digits as its factorization.

9628407809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 9628407809 is about 98124.4506175703. The cubic root of 9628407809 is about 2127.4114490464.

The spelling of 9628407809 in words is "nine billion, six hundred twenty-eight million, four hundred seven thousand, eight hundred nine".