1018884089 has 2 divisors, whose sum is σ = 1018884090. Its totient is φ = 1018884088.

The previous prime is 1018884079. The next prime is 1018884121. The reversal of 1018884089 is 9804888101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 598634089 + 420250000 = 24467^2 + 20500^2 .

It is an emirp because it is prime and its reverse (9804888101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1018884089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1018884029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509442044 + 509442045.

It is an arithmetic number, because the mean of its divisors is an integer number (509442045).

Almost surely, 2^1018884089 is an apocalyptic number.

It is an amenable number.

1018884089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018884089 is an equidigital number, since it uses as much as digits as its factorization.

1018884089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 47.

The square root of 1018884089 is about 31919.9638001048. The cubic root of 1018884089 is about 1006.2554836629.

The spelling of 1018884089 in words is "one billion, eighteen million, eight hundred eighty-four thousand, eighty-nine".