9709798549 has 6 divisors (see below), whose sum is σ = 10672753910. Its totient is φ = 8827089480.

The previous prime is 9709798447. The next prime is 9709798559. The reversal of 9709798549 is 9458979079.

9709798549 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9477022500 + 232776049 = 97350^2 + 15257^2 .

It is not a de Polignac number, because 9709798549 - 2²¹ = 9707701397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9709798559) 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 in 5 ways as a sum of consecutive naturals, for example, 40123014 + ... + 40123255.

Almost surely, 2^9709798549 is an apocalyptic number.

It is an amenable number.

9709798549 is a deficient number, since it is larger than the sum of its proper divisors (962955361).

9709798549 is a wasteful number, since it uses less digits than its factorization.

9709798549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80246291 (or 80246280 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 67.

The square root of 9709798549 is about 98538.3100575609. The cubic root of 9709798549 is about 2133.3891066772.

The spelling of 9709798549 in words is "nine billion, seven hundred nine million, seven hundred ninety-eight thousand, five hundred forty-nine".