108911643 has 16 divisors (see below), whose sum is σ = 149399040. Its totient is φ = 70538976.

The previous prime is 108911641. The next prime is 108911651. The reversal of 108911643 is 346119801.

It is not a de Polignac number, because 108911643 - 2¹ = 108911641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108911641) 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 15 ways as a sum of consecutive naturals, for example, 16821 + ... + 22377.

It is an arithmetic number, because the mean of its divisors is an integer number (9337440).

Almost surely, 2^108911643 is an apocalyptic number.

108911643 is a deficient number, since it is larger than the sum of its proper divisors (40487397).

108911643 is a wasteful number, since it uses less digits than its factorization.

108911643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5746.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 108911643 is about 10436.0741181730. The cubic root of 108911643 is about 477.5565102203.

The spelling of 108911643 in words is "one hundred eight million, nine hundred eleven thousand, six hundred forty-three".