1128915089 has 2 divisors, whose sum is σ = 1128915090. Its totient is φ = 1128915088.

The previous prime is 1128915079. The next prime is 1128915149. The reversal of 1128915089 is 9805198211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109422864 + 19492225 = 33308^2 + 4415^2 .

It is an emirp because it is prime and its reverse (9805198211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1128915089 - 2⁸ = 1128914833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1128915019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564457544 + 564457545.

It is an arithmetic number, because the mean of its divisors is an integer number (564457545).

Almost surely, 2^1128915089 is an apocalyptic number.

It is an amenable number.

1128915089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128915089 is an equidigital number, since it uses as much as digits as its factorization.

1128915089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 44.

The square root of 1128915089 is about 33599.3316749009. The cubic root of 1128915089 is about 1041.2469907252.

The spelling of 1128915089 in words is "one billion, one hundred twenty-eight million, nine hundred fifteen thousand, eighty-nine".