111320509 has 2 divisors, whose sum is σ = 111320510. Its totient is φ = 111320508.

The previous prime is 111320497. The next prime is 111320527. The reversal of 111320509 is 905023111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104960025 + 6360484 = 10245^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 111320509 - 2⁵ = 111320477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111320509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111320569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55660254 + 55660255.

It is an arithmetic number, because the mean of its divisors is an integer number (55660255).

Almost surely, 2^111320509 is an apocalyptic number.

It is an amenable number.

111320509 is a deficient number, since it is larger than the sum of its proper divisors (1).

111320509 is an equidigital number, since it uses as much as digits as its factorization.

111320509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 111320509 is about 10550.8534725869. The cubic root of 111320509 is about 481.0516712658.

The spelling of 111320509 in words is "one hundred eleven million, three hundred twenty thousand, five hundred nine".