1091369 has 2 divisors, whose sum is σ = 1091370. Its totient is φ = 1091368.

The previous prime is 1091359. The next prime is 1091371. The reversal of 1091369 is 9631901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 774400 + 316969 = 880^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091369 - 2²⁰ = 42793 is a prime.

It is a super-2 number, since 2×1091369² = 2382172588322, which contains 22 as substring.

Together with 1091371, 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 (1091329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545684 + 545685.

It is an arithmetic number, because the mean of its divisors is an integer number (545685).

2^1091369 is an apocalyptic number.

It is an amenable number.

1091369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091369 is an equidigital number, since it uses as much as digits as its factorization.

1091369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1091369 is about 1044.6860772500. The cubic root of 1091369 is about 102.9573141375.

The spelling of 1091369 in words is "one million, ninety-one thousand, three hundred sixty-nine".