1113556889 has 2 divisors, whose sum is σ = 1113556890. Its totient is φ = 1113556888.

The previous prime is 1113556879. The next prime is 1113556901. The reversal of 1113556889 is 9886553111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1110022489 + 3534400 = 33317^2 + 1880^2 .

It is an emirp because it is prime and its reverse (9886553111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113556889 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1113556849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556778444 + 556778445.

It is an arithmetic number, because the mean of its divisors is an integer number (556778445).

Almost surely, 2^1113556889 is an apocalyptic number.

It is an amenable number.

1113556889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113556889 is an equidigital number, since it uses as much as digits as its factorization.

1113556889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 47.

The square root of 1113556889 is about 33369.9998351813. Note that the first 3 decimals coincide. The cubic root of 1113556889 is about 1036.5035717800.

The spelling of 1113556889 in words is "one billion, one hundred thirteen million, five hundred fifty-six thousand, eight hundred eighty-nine".