3969109 has 4 divisors (see below), whose sum is σ = 4202604. Its totient is φ = 3735616.

The previous prime is 3969071. The next prime is 3969137. The reversal of 3969109 is 9019693.

3969109 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3526884 + 442225 = 1878^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 3969109 - 2⁷ = 3968981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116722 + ... + 116755.

It is an arithmetic number, because the mean of its divisors is an integer number (1050651).

Almost surely, 2^3969109 is an apocalyptic number.

It is an amenable number.

3969109 is a deficient number, since it is larger than the sum of its proper divisors (233495).

3969109 is a wasteful number, since it uses less digits than its factorization.

3969109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233494.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 3969109 is about 1992.2622819298. The cubic root of 3969109 is about 158.3304120114.

The spelling of 3969109 in words is "three million, nine hundred sixty-nine thousand, one hundred nine".