911000009 has 2 divisors, whose sum is σ = 911000010. Its totient is φ = 911000008.

The previous prime is 910999963. The next prime is 911000039. The reversal of 911000009 is 900000119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520068025 + 390931984 = 22805^2 + 19772^2 .

It is a cyclic number.

It is not a de Polignac number, because 911000009 - 2⁸ = 910999753 is a prime.

It is not a weakly prime, because it can be changed into another prime (911000039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455500004 + 455500005.

It is an arithmetic number, because the mean of its divisors is an integer number (455500005).

Almost surely, 2^911000009 is an apocalyptic number.

It is an amenable number.

911000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

911000009 is an equidigital number, since it uses as much as digits as its factorization.

911000009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 911000009 is about 30182.7766946648. The cubic root of 911000009 is about 969.4069457338.

The spelling of 911000009 in words is "nine hundred eleven million, nine", and thus it is an aban number.