1091089369 has 2 divisors, whose sum is σ = 1091089370. Its totient is φ = 1091089368.

The previous prime is 1091089357. The next prime is 1091089397. The reversal of 1091089369 is 9639801901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1079779600 + 11309769 = 32860^2 + 3363^2 .

It is an emirp because it is prime and its reverse (9639801901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1091089369 - 2⁹ = 1091088857 is a prime.

It is a super-2 number, since 2×1091089369² = 2380952022289636322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1091089319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545544684 + 545544685.

It is an arithmetic number, because the mean of its divisors is an integer number (545544685).

Almost surely, 2^1091089369 is an apocalyptic number.

It is an amenable number.

1091089369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091089369 is an equidigital number, since it uses as much as digits as its factorization.

1091089369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 1091089369 is about 33031.6419361799. The cubic root of 1091089369 is about 1029.4852013171.

The spelling of 1091089369 in words is "one billion, ninety-one million, eighty-nine thousand, three hundred sixty-nine".