9111001 has 2 divisors, whose sum is σ = 9111002. Its totient is φ = 9111000.

The previous prime is 9110989. The next prime is 9111007. The reversal of 9111001 is 1001119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5784025 + 3326976 = 2405^2 + 1824^2 .

It is a cyclic number.

It is not a de Polignac number, because 9111001 - 2⁷ = 9110873 is a prime.

9111001 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9111007) 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, 4555500 + 4555501.

It is an arithmetic number, because the mean of its divisors is an integer number (4555501).

Almost surely, 2^9111001 is an apocalyptic number.

It is an amenable number.

9111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9111001 is an equidigital number, since it uses as much as digits as its factorization.

9111001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 9111001 is about 3018.4434730503. The cubic root of 9111001 is about 208.8600438118.

The spelling of 9111001 in words is "nine million, one hundred eleven thousand, one".