3913909 has 4 divisors (see below), whose sum is σ = 3922560. Its totient is φ = 3905260.

The previous prime is 3913907. The next prime is 3913963. The reversal of 3913909 is 9093193.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9093193 = 719 ⋅12647.

It is a cyclic number.

It is not a de Polignac number, because 3913909 - 2¹ = 3913907 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 (3913907) 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, 3607 + ... + 4564.

It is an arithmetic number, because the mean of its divisors is an integer number (980640).

Almost surely, 2^3913909 is an apocalyptic number.

It is an amenable number.

3913909 is a deficient number, since it is larger than the sum of its proper divisors (8651).

3913909 is an equidigital number, since it uses as much as digits as its factorization.

3913909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8650.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 3913909 is about 1978.3601795426. The cubic root of 3913909 is about 157.5929945480.

The spelling of 3913909 in words is "three million, nine hundred thirteen thousand, nine hundred nine".