1219109 has 2 divisors, whose sum is σ = 1219110. Its totient is φ = 1219108.

The previous prime is 1219091. The next prime is 1219111. The reversal of 1219109 is 9019121.

Together with previous prime (1219091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1216609 + 2500 = 1103^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 1219109 - 2⁸ = 1218853 is a prime.

Together with 1219111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1219129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609554 + 609555.

It is an arithmetic number, because the mean of its divisors is an integer number (609555).

2^1219109 is an apocalyptic number.

It is an amenable number.

1219109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219109 is an equidigital number, since it uses as much as digits as its factorization.

1219109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1219109 is about 1104.1326913012. The cubic root of 1219109 is about 106.8269541117.

The spelling of 1219109 in words is "one million, two hundred nineteen thousand, one hundred nine".