9898987805 has 8 divisors (see below), whose sum is σ = 13575754752. Its totient is φ = 6787877328.

The previous prime is 9898987799. The next prime is 9898987811. The reversal of 9898987805 is 5087898989.

It is an interprime number because it is at equal distance from previous prime (9898987799) and next prime (9898987811).

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 9898987805 - 2⁴ = 9898987789 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141414077 + ... + 141414146.

It is an arithmetic number, because the mean of its divisors is an integer number (1696969344).

Almost surely, 2^9898987805 is an apocalyptic number.

It is an amenable number.

9898987805 is a deficient number, since it is larger than the sum of its proper divisors (3676766947).

9898987805 is a wasteful number, since it uses less digits than its factorization.

9898987805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282828235.

The product of its (nonzero) digits is 104509440, while the sum is 71.

The square root of 9898987805 is about 99493.6571093856. The cubic root of 9898987805 is about 2147.1559875811.

The spelling of 9898987805 in words is "nine billion, eight hundred ninety-eight million, nine hundred eighty-seven thousand, eight hundred five".