9940001 has 2 divisors, whose sum is σ = 9940002. Its totient is φ = 9940000.

The previous prime is 9939971. The next prime is 9940003. The reversal of 9940001 is 1000499.

9940001 is nontrivially palindromic in base 14.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9759376 + 180625 = 3124^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 9940001 - 2²² = 5745697 is a prime.

Together with 9940003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9940003) 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, 4970000 + 4970001.

It is an arithmetic number, because the mean of its divisors is an integer number (4970001).

Almost surely, 2^9940001 is an apocalyptic number.

It is an amenable number.

9940001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9940001 is an equidigital number, since it uses as much as digits as its factorization.

9940001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 9940001 is about 3152.7767126773. The cubic root of 9940001 is about 215.0117246175.

The spelling of 9940001 in words is "nine million, nine hundred forty thousand, one".