111009805 has 8 divisors (see below), whose sum is σ = 136812312. Its totient is φ = 86407488.

The previous prime is 111009803. The next prime is 111009809. The reversal of 111009805 is 508900111.

It can be written as a sum of positive squares in 4 ways, for example, as 24631369 + 86378436 = 4963^2 + 9294^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111009805 - 2¹ = 111009803 is a prime.

It is a super-2 number, since 2×111009805² = 24646353612276050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111009805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111009803) 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 in 7 ways as a sum of consecutive naturals, for example, 299842 + ... + 300211.

It is an arithmetic number, because the mean of its divisors is an integer number (17101539).

Almost surely, 2^111009805 is an apocalyptic number.

It is an amenable number.

111009805 is a deficient number, since it is larger than the sum of its proper divisors (25802507).

111009805 is an equidigital number, since it uses as much as digits as its factorization.

111009805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600095.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 111009805 is about 10536.1190672847. The cubic root of 111009805 is about 480.6037036463.

Adding to 111009805 its reverse (508900111), we get a palindrome (619909916).

The spelling of 111009805 in words is "one hundred eleven million, nine thousand, eight hundred five".