3917409 has 4 divisors (see below), whose sum is σ = 5223216. Its totient is φ = 2611604.

The previous prime is 3917323. The next prime is 3917411. The reversal of 3917409 is 9047193.

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 not a de Polignac number, because 3917409 - 2⁷ = 3917281 is a prime.

It is a D-number.

It is a Curzon number.

3917409 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3917409.

It is not an unprimeable number, because it can be changed into a prime (3917479) 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, 652899 + ... + 652904.

It is an arithmetic number, because the mean of its divisors is an integer number (1305804).

Almost surely, 2^3917409 is an apocalyptic number.

It is an amenable number.

3917409 is a deficient number, since it is larger than the sum of its proper divisors (1305807).

3917409 is a wasteful number, since it uses less digits than its factorization.

3917409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305806.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 3917409 is about 1979.2445528534. The cubic root of 3917409 is about 157.6399562214.

The spelling of 3917409 in words is "three million, nine hundred seventeen thousand, four hundred nine".