9998005 has 8 divisors (see below), whose sum is σ = 12029400. Its totient is φ = 7977216.

The previous prime is 9997997. The next prime is 9998017. The reversal of 9998005 is 5008999.

9998005 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3837681 + 6160324 = 1959^2 + 2482^2 .

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 9998005 - 2³ = 9997997 is a prime.

9998005 is a lucky 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, 400 + ... + 4489.

It is an arithmetic number, because the mean of its divisors is an integer number (1503675).

Almost surely, 2^9998005 is an apocalyptic number.

It is an amenable number.

9998005 is a deficient number, since it is larger than the sum of its proper divisors (2031395).

9998005 is a wasteful number, since it uses less digits than its factorization.

9998005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 9998005 is about 3161.9622072378. The cubic root of 9998005 is about 215.4291410596.

The spelling of 9998005 in words is "nine million, nine hundred ninety-eight thousand, five".