1311109 has 2 divisors, whose sum is σ = 1311110. Its totient is φ = 1311108.

The previous prime is 1311103. The next prime is 1311127. The reversal of 1311109 is 9011131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 770884 + 540225 = 878^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311109 - 2¹⁵ = 1278341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311092 and 1311101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655554 + 655555.

It is an arithmetic number, because the mean of its divisors is an integer number (655555).

2^1311109 is an apocalyptic number.

It is an amenable number.

1311109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311109 is an equidigital number, since it uses as much as digits as its factorization.

1311109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 1311109 is about 1145.0366806352. The cubic root of 1311109 is about 109.4492860243.

The spelling of 1311109 in words is "one million, three hundred eleven thousand, one hundred nine".