1128989863 has 2 divisors, whose sum is σ = 1128989864. Its totient is φ = 1128989862.

The previous prime is 1128989803. The next prime is 1128989879. The reversal of 1128989863 is 3689898211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1128989863 - 2¹³ = 1128981671 is a prime.

It is a super-2 number, since 2×1128989863² = 2549236221513517538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128989803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564494931 + 564494932.

It is an arithmetic number, because the mean of its divisors is an integer number (564494932).

Almost surely, 2^1128989863 is an apocalyptic number.

1128989863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128989863 is an equidigital number, since it uses as much as digits as its factorization.

1128989863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 55.

The square root of 1128989863 is about 33600.4443869423. Note that the first 3 decimals coincide. The cubic root of 1128989863 is about 1041.2699793108.

The spelling of 1128989863 in words is "one billion, one hundred twenty-eight million, nine hundred eighty-nine thousand, eight hundred sixty-three".