9809897061 has 16 divisors (see below), whose sum is σ = 13530036800. Its totient is φ = 6317388288.

The previous prime is 9809897059. The next prime is 9809897101. The reversal of 9809897061 is 1607989089.

It is not a de Polignac number, because 9809897061 - 2¹ = 9809897059 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9809896992 and 9809897010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9809897051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302476 + ... + 333333.

It is an arithmetic number, because the mean of its divisors is an integer number (845627300).

Almost surely, 2^9809897061 is an apocalyptic number.

It is an amenable number.

9809897061 is a deficient number, since it is larger than the sum of its proper divisors (3720139739).

9809897061 is a wasteful number, since it uses less digits than its factorization.

9809897061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635988.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 9809897061 is about 99044.9244585506. The cubic root of 9809897061 is about 2140.6951086466.

The spelling of 9809897061 in words is "nine billion, eight hundred nine million, eight hundred ninety-seven thousand, sixty-one".