108163945 has 24 divisors (see below), whose sum is σ = 141051672. Its totient is φ = 79349760.

The previous prime is 108163943. The next prime is 108163973. The reversal of 108163945 is 549361801.

It can be written as a sum of positive squares in 12 ways, for example, as 57881664 + 50282281 = 7608^2 + 7091^2 .

It is not a de Polignac number, because 108163945 - 2¹ = 108163943 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108163943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142507 + ... + 143263.

It is an arithmetic number, because the mean of its divisors is an integer number (5877153).

Almost surely, 2^108163945 is an apocalyptic number.

It is an amenable number.

108163945 is a deficient number, since it is larger than the sum of its proper divisors (32887727).

108163945 is an equidigital number, since it uses as much as digits as its factorization.

108163945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 108163945 is about 10400.1896617321. The cubic root of 108163945 is about 476.4611627117.

The spelling of 108163945 in words is "one hundred eight million, one hundred sixty-three thousand, nine hundred forty-five".