9898968637 has 4 divisors (see below), whose sum is σ = 9920441916. Its totient is φ = 9877495360.

The previous prime is 9898968617. The next prime is 9898968671. The reversal of 9898968637 is 7368698989.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5403132036 + 4495836601 = 73506^2 + 67051^2 .

It is a cyclic number.

It is not a de Polignac number, because 9898968637 - 2⁷ = 9898968509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9898968637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9898968617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10735948 + ... + 10736869.

It is an arithmetic number, because the mean of its divisors is an integer number (2480110479).

Almost surely, 2^9898968637 is an apocalyptic number.

It is an amenable number.

9898968637 is a deficient number, since it is larger than the sum of its proper divisors (21473279).

9898968637 is a wasteful number, since it uses less digits than its factorization.

9898968637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21473278.

The product of its digits is 282175488, while the sum is 73.

The square root of 9898968637 is about 99493.5607815903. The cubic root of 9898968637 is about 2147.1546016915.

The spelling of 9898968637 in words is "nine billion, eight hundred ninety-eight million, nine hundred sixty-eight thousand, six hundred thirty-seven".