1100009 has 2 divisors, whose sum is σ = 1100010. Its totient is φ = 1100008.

The previous prime is 1099997. The next prime is 1100023. The reversal of 1100009 is 9000011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 570025 + 529984 = 755^2 + 728^2 .

It is an emirp because it is prime and its reverse (9000011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100009 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1100039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550004 + 550005.

It is an arithmetic number, because the mean of its divisors is an integer number (550005).

2^1100009 is an apocalyptic number.

It is an amenable number.

1100009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100009 is an equidigital number, since it uses as much as digits as its factorization.

1100009 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 11.

The square root of 1100009 is about 1048.8131387430. The cubic root of 1100009 is about 103.2282930758.

The spelling of 1100009 in words is "one million, one hundred thousand, nine".