109563985 has 12 divisors (see below), whose sum is σ = 134166132. Its totient is φ = 85863648.

The previous prime is 109563947. The next prime is 109564033. The reversal of 109563985 is 589365901.

It can be written as a sum of positive squares in 2 ways, for example, as 59536656 + 50027329 = 7716^2 + 7073^2 .

It is not a de Polignac number, because 109563985 - 2²³ = 101175377 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 11 ways as a sum of consecutive naturals, for example, 170074 + ... + 170716.

It is an arithmetic number, because the mean of its divisors is an integer number (11180511).

Almost surely, 2^109563985 is an apocalyptic number.

It is an amenable number.

109563985 is a deficient number, since it is larger than the sum of its proper divisors (24602147).

109563985 is an frugal number, since it uses more digits than its factorization.

109563985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 109563985 is about 10467.2816432921. The cubic root of 109563985 is about 478.5080774325.

It can be divided in two parts, 10956 and 3985, that added together give a palindrome (14941).

The spelling of 109563985 in words is "one hundred nine million, five hundred sixty-three thousand, nine hundred eighty-five".