1128434849 has 2 divisors, whose sum is σ = 1128434850. Its totient is φ = 1128434848.

The previous prime is 1128434821. The next prime is 1128434869. The reversal of 1128434849 is 9484348211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 673039249 + 455395600 = 25943^2 + 21340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128434849 - 2¹² = 1128430753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1128434869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564217424 + 564217425.

It is an arithmetic number, because the mean of its divisors is an integer number (564217425).

Almost surely, 2^1128434849 is an apocalyptic number.

It is an amenable number.

1128434849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128434849 is an equidigital number, since it uses as much as digits as its factorization.

1128434849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 44.

The square root of 1128434849 is about 33592.1843439810. The cubic root of 1128434849 is about 1041.0993211076.

The spelling of 1128434849 in words is "one billion, one hundred twenty-eight million, four hundred thirty-four thousand, eight hundred forty-nine".