111664593 has 12 divisors (see below), whose sum is σ = 165044880. Its totient is φ = 72711576.

The previous prime is 111664583. The next prime is 111664601. The reversal of 111664593 is 395466111.

111664593 is a `hidden beast` number, since 1 + 1 + 1 + 6 + 64 + 593 = 666.

It is not a de Polignac number, because 111664593 - 2⁵ = 111664561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111664513) 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 in 11 ways as a sum of consecutive naturals, for example, 143883 + ... + 144656.

It is an arithmetic number, because the mean of its divisors is an integer number (13753740).

Almost surely, 2^111664593 is an apocalyptic number.

It is an amenable number.

111664593 is a deficient number, since it is larger than the sum of its proper divisors (53380287).

111664593 is a wasteful number, since it uses less digits than its factorization.

111664593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288588 (or 288585 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 111664593 is about 10567.1468713177. The cubic root of 111664593 is about 481.5467939758.

The spelling of 111664593 in words is "one hundred eleven million, six hundred sixty-four thousand, five hundred ninety-three".