9998001 has 12 divisors (see below), whose sum is σ = 15552628. Its totient is φ = 6152544.

The previous prime is 9997997. The next prime is 9998017. The reversal of 9998001 is 1008999.

It can be written as a sum of positive squares in 2 ways, for example, as 4309776 + 5688225 = 2076^2 + 2385^2 .

It is not a de Polignac number, because 9998001 - 2² = 9997997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9998201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42610 + ... + 42843.

Almost surely, 2^9998001 is an apocalyptic number.

It is an amenable number.

9998001 is a deficient number, since it is larger than the sum of its proper divisors (5554627).

9998001 is a wasteful number, since it uses less digits than its factorization.

9998001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85472 (or 85469 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 9998001 is about 3161.9615747191. The cubic root of 9998001 is about 215.4291123300.

It can be divided in two parts, 9 and 998001, that multiplied together give a square (8982009 = 2997²).

The spelling of 9998001 in words is "nine million, nine hundred ninety-eight thousand, one".