111244613 has 2 divisors, whose sum is σ = 111244614. Its totient is φ = 111244612.

The previous prime is 111244543. The next prime is 111244631. The reversal of 111244613 is 316442111.

Together with next prime (111244631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94614529 + 16630084 = 9727^2 + 4078^2 .

It is a cyclic number.

It is not a de Polignac number, because 111244613 - 2²⁴ = 94467397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111244633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55622306 + 55622307.

It is an arithmetic number, because the mean of its divisors is an integer number (55622307).

Almost surely, 2^111244613 is an apocalyptic number.

It is an amenable number.

111244613 is a deficient number, since it is larger than the sum of its proper divisors (1).

111244613 is an equidigital number, since it uses as much as digits as its factorization.

111244613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 111244613 is about 10547.2561834820. The cubic root of 111244613 is about 480.9423227479.

Adding to 111244613 its reverse (316442111), we get a palindrome (427686724).

The spelling of 111244613 in words is "one hundred eleven million, two hundred forty-four thousand, six hundred thirteen".