9989808425 has 6 divisors (see below), whose sum is σ = 12387362478. Its totient is φ = 7991846720.

The previous prime is 9989808419. The next prime is 9989808427. The reversal of 9989808425 is 5248089899.

It can be written as a sum of positive squares in 3 ways, for example, as 290907136 + 9698901289 = 17056^2 + 98483^2 .

It is not a de Polignac number, because 9989808425 - 2¹⁴ = 9989792041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9989808427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199796144 + ... + 199796193.

It is an arithmetic number, because the mean of its divisors is an integer number (2064560413).

Almost surely, 2^9989808425 is an apocalyptic number.

It is an amenable number.

9989808425 is a deficient number, since it is larger than the sum of its proper divisors (2397554053).

9989808425 is a wasteful number, since it uses less digits than its factorization.

9989808425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399592347 (or 399592342 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 62.

The square root of 9989808425 is about 99949.0291348545. The cubic root of 9989808425 is about 2153.7025384921.

The spelling of 9989808425 in words is "nine billion, nine hundred eighty-nine million, eight hundred eight thousand, four hundred twenty-five".