1128631783 has 2 divisors, whose sum is σ = 1128631784. Its totient is φ = 1128631782.

The previous prime is 1128631771. The next prime is 1128631789. The reversal of 1128631783 is 3871368211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128631783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128631789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564315891 + 564315892.

It is an arithmetic number, because the mean of its divisors is an integer number (564315892).

Almost surely, 2^1128631783 is an apocalyptic number.

1128631783 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128631783 is an equidigital number, since it uses as much as digits as its factorization.

1128631783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 1128631783 is about 33595.1154634122. The cubic root of 1128631783 is about 1041.1598816642.

Adding to 1128631783 its reverse (3871368211), we get a palindrome (4999999994).

The spelling of 1128631783 in words is "one billion, one hundred twenty-eight million, six hundred thirty-one thousand, seven hundred eighty-three".