9988001 has 2 divisors, whose sum is σ = 9988002. Its totient is φ = 9988000.

The previous prime is 9987979. The next prime is 9988007. The reversal of 9988001 is 1008899.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 2401 = 3160^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 9988001 - 2⁶ = 9987937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9988007) 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 as a sum of consecutive naturals, namely, 4994000 + 4994001.

It is an arithmetic number, because the mean of its divisors is an integer number (4994001).

Almost surely, 2^9988001 is an apocalyptic number.

It is an amenable number.

9988001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988001 is an equidigital number, since it uses as much as digits as its factorization.

9988001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 9988001 is about 3160.3798822293. The cubic root of 9988001 is about 215.3572643088.

The spelling of 9988001 in words is "nine million, nine hundred eighty-eight thousand, one".