111247289 has 2 divisors, whose sum is σ = 111247290. Its totient is φ = 111247288.

The previous prime is 111247249. The next prime is 111247319. The reversal of 111247289 is 982742111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110607289 + 640000 = 10517^2 + 800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111247289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111247229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55623644 + 55623645.

It is an arithmetic number, because the mean of its divisors is an integer number (55623645).

Almost surely, 2^111247289 is an apocalyptic number.

It is an amenable number.

111247289 is a deficient number, since it is larger than the sum of its proper divisors (1).

111247289 is an equidigital number, since it uses as much as digits as its factorization.

111247289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 35.

The square root of 111247289 is about 10547.3830403565. The cubic root of 111247289 is about 480.9461790884.

The spelling of 111247289 in words is "one hundred eleven million, two hundred forty-seven thousand, two hundred eighty-nine".