3940109 has 4 divisors (see below), whose sum is σ = 3956700. Its totient is φ = 3923520.

The previous prime is 3940099. The next prime is 3940117. The reversal of 3940109 is 9010493.

It is a happy number.

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 1755625 + 2184484 = 1325^2 + 1478^2 .

It is a cyclic number.

It is not a de Polignac number, because 3940109 - 2¹⁶ = 3874573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940159) 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, 7934 + ... + 8415.

It is an arithmetic number, because the mean of its divisors is an integer number (989175).

Almost surely, 2^3940109 is an apocalyptic number.

It is an amenable number.

3940109 is a deficient number, since it is larger than the sum of its proper divisors (16591).

3940109 is a wasteful number, since it uses less digits than its factorization.

3940109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16590.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 3940109 is about 1984.9707806414. The cubic root of 3940109 is about 157.9438592404.

The spelling of 3940109 in words is "three million, nine hundred forty thousand, one hundred nine".