1128720847 has 2 divisors, whose sum is σ = 1128720848. Its totient is φ = 1128720846.

The previous prime is 1128720829. The next prime is 1128720863. The reversal of 1128720847 is 7480278211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1128720847 - 2¹⁵ = 1128688079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128720347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564360423 + 564360424.

It is an arithmetic number, because the mean of its divisors is an integer number (564360424).

Almost surely, 2^1128720847 is an apocalyptic number.

1128720847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128720847 is an equidigital number, since it uses as much as digits as its factorization.

1128720847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 1128720847 is about 33596.4409871046. The cubic root of 1128720847 is about 1041.1872680466.

The spelling of 1128720847 in words is "one billion, one hundred twenty-eight million, seven hundred twenty thousand, eight hundred forty-seven".