9931001 has 2 divisors, whose sum is σ = 9931002. Its totient is φ = 9931000.

The previous prime is 9930997. The next prime is 9931007. The reversal of 9931001 is 1001399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9461776 + 469225 = 3076^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 9931001 - 2² = 9930997 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9931007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965500 + 4965501.

It is an arithmetic number, because the mean of its divisors is an integer number (4965501).

Almost surely, 2^9931001 is an apocalyptic number.

It is an amenable number.

9931001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9931001 is an equidigital number, since it uses as much as digits as its factorization.

9931001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 9931001 is about 3151.3490761894. The cubic root of 9931001 is about 214.9468121542.

The spelling of 9931001 in words is "nine million, nine hundred thirty-one thousand, one".