11065991 has 2 divisors, whose sum is σ = 11065992. Its totient is φ = 11065990.

The previous prime is 11065987. The next prime is 11066021. The reversal of 11065991 is 19956011.

It is a happy number.

11065991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11065991 - 2² = 11065987 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11065931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5532995 + 5532996.

It is an arithmetic number, because the mean of its divisors is an integer number (5532996).

Almost surely, 2^11065991 is an apocalyptic number.

11065991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11065991 is an equidigital number, since it uses as much as digits as its factorization.

11065991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 11065991 is about 3326.5584317730. The cubic root of 11065991 is about 222.8418580239.

The spelling of 11065991 in words is "eleven million, sixty-five thousand, nine hundred ninety-one".