111355889 has 2 divisors, whose sum is σ = 111355890. Its totient is φ = 111355888.

The previous prime is 111355859. The next prime is 111355901. The reversal of 111355889 is 988553111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110986225 + 369664 = 10535^2 + 608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111355889 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (111355859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55677944 + 55677945.

It is an arithmetic number, because the mean of its divisors is an integer number (55677945).

Almost surely, 2^111355889 is an apocalyptic number.

It is an amenable number.

111355889 is a deficient number, since it is larger than the sum of its proper divisors (1).

111355889 is an equidigital number, since it uses as much as digits as its factorization.

111355889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 41.

The square root of 111355889 is about 10552.5299810046. The cubic root of 111355889 is about 481.1026286486.

The spelling of 111355889 in words is "one hundred eleven million, three hundred fifty-five thousand, eight hundred eighty-nine".