3994109 has 4 divisors (see below), whose sum is σ = 4564704. Its totient is φ = 3423516.

The previous prime is 3994103. The next prime is 3994121. The reversal of 3994109 is 9014993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3994109 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994103) 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, 285287 + ... + 285300.

It is an arithmetic number, because the mean of its divisors is an integer number (1141176).

Almost surely, 2^3994109 is an apocalyptic number.

It is an amenable number.

3994109 is a deficient number, since it is larger than the sum of its proper divisors (570595).

3994109 is an equidigital number, since it uses as much as digits as its factorization.

3994109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570594.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 3994109 is about 1998.5267073522. The cubic root of 3994109 is about 158.6621387459.

The spelling of 3994109 in words is "three million, nine hundred ninety-four thousand, one hundred nine".