9898000061 has 2 divisors, whose sum is σ = 9898000062. Its totient is φ = 9898000060.

The previous prime is 9898000043. The next prime is 9898000111. The reversal of 9898000061 is 1600008989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9477996025 + 420004036 = 97355^2 + 20494^2 .

It is a cyclic number.

It is not a de Polignac number, because 9898000061 - 2¹⁰ = 9897999037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9897999982 and 9898000018.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9898030061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949000030 + 4949000031.

It is an arithmetic number, because the mean of its divisors is an integer number (4949000031).

Almost surely, 2^9898000061 is an apocalyptic number.

It is an amenable number.

9898000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

9898000061 is an equidigital number, since it uses as much as digits as its factorization.

9898000061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 9898000061 is about 99488.6931314308. The cubic root of 9898000061 is about 2147.0845691347.

The spelling of 9898000061 in words is "nine billion, eight hundred ninety-eight million, sixty-one", and thus it is an aban number.