1091284559 has 2 divisors, whose sum is σ = 1091284560. Its totient is φ = 1091284558.

The previous prime is 1091284517. The next prime is 1091284561. The reversal of 1091284559 is 9554821901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1091284559 - 2⁸ = 1091284303 is a prime.

Together with 1091284561, 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 (1091281559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545642279 + 545642280.

It is an arithmetic number, because the mean of its divisors is an integer number (545642280).

Almost surely, 2^1091284559 is an apocalyptic number.

1091284559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091284559 is an equidigital number, since it uses as much as digits as its factorization.

1091284559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 44.

The square root of 1091284559 is about 33034.5963952944. The cubic root of 1091284559 is about 1029.5465874389.

The spelling of 1091284559 in words is "one billion, ninety-one million, two hundred eighty-four thousand, five hundred fifty-nine".