1100312009 has 2 divisors, whose sum is σ = 1100312010. Its totient is φ = 1100312008.

The previous prime is 1100311987. The next prime is 1100312011. The reversal of 1100312009 is 9002130011.

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., 714385984 + 385926025 = 26728^2 + 19645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100312009 - 2⁸ = 1100311753 is a prime.

Together with 1100312011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1100302009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550156004 + 550156005.

It is an arithmetic number, because the mean of its divisors is an integer number (550156005).

Almost surely, 2^1100312009 is an apocalyptic number.

It is an amenable number.

1100312009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100312009 is an equidigital number, since it uses as much as digits as its factorization.

1100312009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1100312009 is about 33170.9512827112. The cubic root of 1100312009 is about 1032.3777064379.

The spelling of 1100312009 in words is "one billion, one hundred million, three hundred twelve thousand, nine".