9840001 has 2 divisors, whose sum is σ = 9840002. Its totient is φ = 9840000.

The previous prime is 9839993. The next prime is 9840011. The reversal of 9840001 is 1000489.

9840001 is nontrivially palindromic in base 5.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9461776 + 378225 = 3076^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 9840001 - 2³ = 9839993 is a prime.

9840001 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9840011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4920000 + 4920001.

It is an arithmetic number, because the mean of its divisors is an integer number (4920001).

Almost surely, 2^9840001 is an apocalyptic number.

It is an amenable number.

9840001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9840001 is an equidigital number, since it uses as much as digits as its factorization.

9840001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 9840001 is about 3136.8775876658. The cubic root of 9840001 is about 214.2882611972.

The spelling of 9840001 in words is "nine million, eight hundred forty thousand, one".