1128128539 has 2 divisors, whose sum is σ = 1128128540. Its totient is φ = 1128128538.

The previous prime is 1128128501. The next prime is 1128128569. The reversal of 1128128539 is 9358218211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1128128539 - 2¹⁹ = 1127604251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1128128569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564064269 + 564064270.

It is an arithmetic number, because the mean of its divisors is an integer number (564064270).

Almost surely, 2^1128128539 is an apocalyptic number.

1128128539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128128539 is an equidigital number, since it uses as much as digits as its factorization.

1128128539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 40.

The square root of 1128128539 is about 33587.6247894965. The cubic root of 1128128539 is about 1041.0051115652.

The spelling of 1128128539 in words is "one billion, one hundred twenty-eight million, one hundred twenty-eight thousand, five hundred thirty-nine".