105489081 has 8 divisors (see below), whose sum is σ = 156280160. Its totient is φ = 70326036.

The previous prime is 105489077. The next prime is 105489091. The reversal of 105489081 is 180984501.

It is not a de Polignac number, because 105489081 - 2² = 105489077 is a prime.

It is a super-2 number, since 2×105489081² = 22255892420449122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105489061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1953475 + ... + 1953528.

It is an arithmetic number, because the mean of its divisors is an integer number (19535020).

Almost surely, 2^105489081 is an apocalyptic number.

It is an amenable number.

105489081 is a deficient number, since it is larger than the sum of its proper divisors (50791079).

105489081 is an equidigital number, since it uses as much as digits as its factorization.

105489081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907012 (or 3907006 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 105489081 is about 10270.7877497298. The cubic root of 105489081 is about 472.5007508177.

The spelling of 105489081 in words is "one hundred five million, four hundred eighty-nine thousand, eighty-one".