1115055889 has 2 divisors, whose sum is σ = 1115055890. Its totient is φ = 1115055888.

The previous prime is 1115055883. The next prime is 1115055901. The reversal of 1115055889 is 9885505111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635796225 + 479259664 = 25215^2 + 21892^2 .

It is an emirp because it is prime and its reverse (9885505111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1115055889 - 2⁷ = 1115055761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1115055883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557527944 + 557527945.

It is an arithmetic number, because the mean of its divisors is an integer number (557527945).

Almost surely, 2^1115055889 is an apocalyptic number.

It is an amenable number.

1115055889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115055889 is an equidigital number, since it uses as much as digits as its factorization.

1115055889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 43.

The square root of 1115055889 is about 33392.4525753949. The cubic root of 1115055889 is about 1036.9684551394.

The spelling of 1115055889 in words is "one billion, one hundred fifteen million, fifty-five thousand, eight hundred eighty-nine".