9998187405 has 8 divisors (see below), whose sum is σ = 15997099872. Its totient is φ = 5332366608.

The previous prime is 9998187343. The next prime is 9998187413. The reversal of 9998187405 is 5047818999.

9998187405 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9998187405 - 2⁶ = 9998187341 is a prime.

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, 333272899 + ... + 333272928.

It is an arithmetic number, because the mean of its divisors is an integer number (1999637484).

Almost surely, 2^9998187405 is an apocalyptic number.

It is an amenable number.

9998187405 is a deficient number, since it is larger than the sum of its proper divisors (5998912467).

9998187405 is a wasteful number, since it uses less digits than its factorization.

9998187405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666545835.

The product of its (nonzero) digits is 6531840, while the sum is 60.

The square root of 9998187405 is about 99990.9366142752. The cubic root of 9998187405 is about 2154.3045115813.

The spelling of 9998187405 in words is "nine billion, nine hundred ninety-eight million, one hundred eighty-seven thousand, four hundred five".