1091219 has 2 divisors, whose sum is σ = 1091220. Its totient is φ = 1091218.

The previous prime is 1091191. The next prime is 1091221. The reversal of 1091219 is 9121901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1091219 - 2⁸ = 1090963 is a prime.

It is a super-2 number, since 2×1091219² = 2381517811922, which contains 22 as substring.

Together with 1091221, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1091194 and 1091203.

It is not a weakly prime, because it can be changed into another prime (1091239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545609 + 545610.

It is an arithmetic number, because the mean of its divisors is an integer number (545610).

2^1091219 is an apocalyptic number.

1091219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091219 is an equidigital number, since it uses as much as digits as its factorization.

1091219 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 1091219 is about 1044.6142828815. The cubic root of 1091219 is about 102.9525970330.

The spelling of 1091219 in words is "one million, ninety-one thousand, two hundred nineteen".