1091228783 has 2 divisors, whose sum is σ = 1091228784. Its totient is φ = 1091228782.

The previous prime is 1091228773. The next prime is 1091228797. The reversal of 1091228783 is 3878221901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1091228783 - 2⁸ = 1091228527 is a prime.

It is a super-2 number, since 2×1091228783² = 2381560513695322178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1091228783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1091228773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545614391 + 545614392.

It is an arithmetic number, because the mean of its divisors is an integer number (545614392).

Almost surely, 2^1091228783 is an apocalyptic number.

1091228783 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091228783 is an equidigital number, since it uses as much as digits as its factorization.

1091228783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1091228783 is about 33033.7521786430. The cubic root of 1091228783 is about 1029.5290469578.

The spelling of 1091228783 in words is "one billion, ninety-one million, two hundred twenty-eight thousand, seven hundred eighty-three".