111138289 has 2 divisors, whose sum is σ = 111138290. Its totient is φ = 111138288.

The previous prime is 111138283. The next prime is 111138329. The reversal of 111138289 is 982831111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108513889 + 2624400 = 10417^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 111138289 - 2⁷ = 111138161 is a prime.

It is not a weakly prime, because it can be changed into another prime (111138283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55569144 + 55569145.

It is an arithmetic number, because the mean of its divisors is an integer number (55569145).

Almost surely, 2^111138289 is an apocalyptic number.

It is an amenable number.

111138289 is a deficient number, since it is larger than the sum of its proper divisors (1).

111138289 is an equidigital number, since it uses as much as digits as its factorization.

111138289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 34.

The square root of 111138289 is about 10542.2146155350. The cubic root of 111138289 is about 480.7890508722.

The spelling of 111138289 in words is "one hundred eleven million, one hundred thirty-eight thousand, two hundred eighty-nine".