111913709 has 2 divisors, whose sum is σ = 111913710. Its totient is φ = 111913708.

The previous prime is 111913663. The next prime is 111913729. The reversal of 111913709 is 907319111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109098025 + 2815684 = 10445^2 + 1678^2 .

It is a cyclic number.

It is not a de Polignac number, because 111913709 - 2¹⁶ = 111848173 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 (111913729) 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, 55956854 + 55956855.

It is an arithmetic number, because the mean of its divisors is an integer number (55956855).

Almost surely, 2^111913709 is an apocalyptic number.

It is an amenable number.

111913709 is a deficient number, since it is larger than the sum of its proper divisors (1).

111913709 is an equidigital number, since it uses as much as digits as its factorization.

111913709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701, while the sum is 32.

The square root of 111913709 is about 10578.9275921522. The cubic root of 111913709 is about 481.9046272276.

The spelling of 111913709 in words is "one hundred eleven million, nine hundred thirteen thousand, seven hundred nine".