108815965 has 4 divisors (see below), whose sum is σ = 130579164. Its totient is φ = 87052768.

The previous prime is 108815957. The next prime is 108815977. The reversal of 108815965 is 569518801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569518801 = 23 ⋅24761687.

It can be written as a sum of positive squares in 2 ways, for example, as 42263001 + 66552964 = 6501^2 + 8158^2 .

It is a cyclic number.

It is not a de Polignac number, because 108815965 - 2³ = 108815957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10881592 + ... + 10881601.

It is an arithmetic number, because the mean of its divisors is an integer number (32644791).

Almost surely, 2^108815965 is an apocalyptic number.

It is an amenable number.

108815965 is a deficient number, since it is larger than the sum of its proper divisors (21763199).

108815965 is an equidigital number, since it uses as much as digits as its factorization.

108815965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21763198.

The product of its (nonzero) digits is 86400, while the sum is 43.

The square root of 108815965 is about 10431.4891075052. The cubic root of 108815965 is about 477.4166260690.

The spelling of 108815965 in words is "one hundred eight million, eight hundred fifteen thousand, nine hundred sixty-five".