3909105 has 12 divisors (see below), whose sum is σ = 6775860. Its totient is φ = 2084832.

The previous prime is 3909091. The next prime is 3909107. The reversal of 3909105 is 5019093.

3909105 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 2 ways, for example, as 1361889 + 2547216 = 1167^2 + 1596^2 .

It is not a de Polignac number, because 3909105 - 2¹⁰ = 3908081 is a prime.

It is a super-2 number, since 2×3909105² = 30562203802050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3909107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43390 + ... + 43479.

It is an arithmetic number, because the mean of its divisors is an integer number (564655).

Almost surely, 2^3909105 is an apocalyptic number.

It is an amenable number.

3909105 is a deficient number, since it is larger than the sum of its proper divisors (2866755).

3909105 is a wasteful number, since it uses less digits than its factorization.

3909105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86880 (or 86877 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 3909105 is about 1977.1456698989. The cubic root of 3909105 is about 157.5284906887.

The spelling of 3909105 in words is "three million, nine hundred nine thousand, one hundred five".