1011011909 has 2 divisors, whose sum is σ = 1011011910. Its totient is φ = 1011011908.

The previous prime is 1011011873. The next prime is 1011011917. The reversal of 1011011909 is 9091101101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 910711684 + 100300225 = 30178^2 + 10015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011011909 - 2⁸ = 1011011653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011011999) 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, 505505954 + 505505955.

It is an arithmetic number, because the mean of its divisors is an integer number (505505955).

Almost surely, 2^1011011909 is an apocalyptic number.

It is an amenable number.

1011011909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011011909 is an equidigital number, since it uses as much as digits as its factorization.

1011011909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 23.

The square root of 1011011909 is about 31796.4134612695. The cubic root of 1011011909 is about 1003.6572445896.

The spelling of 1011011909 in words is "one billion, eleven million, eleven thousand, nine hundred nine".