9898731993 has 8 divisors (see below), whose sum is σ = 13479124608. Its totient is φ = 6458747024.

The previous prime is 9898731979. The next prime is 9898732003. The reversal of 9898731993 is 3991378989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9898731993 - 2⁹ = 9898731481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9898731793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35101746 + ... + 35102027.

It is an arithmetic number, because the mean of its divisors is an integer number (1684890576).

Almost surely, 2^9898731993 is an apocalyptic number.

It is an amenable number.

9898731993 is a deficient number, since it is larger than the sum of its proper divisors (3580392615).

9898731993 is a wasteful number, since it uses less digits than its factorization.

9898731993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70203823.

The product of its digits is 26453952, while the sum is 66.

The square root of 9898731993 is about 99492.3715316908. The cubic root of 9898731993 is about 2147.1374916497.

The spelling of 9898731993 in words is "nine billion, eight hundred ninety-eight million, seven hundred thirty-one thousand, nine hundred ninety-three".