3421909 has 4 divisors (see below), whose sum is σ = 3429216. Its totient is φ = 3414604.

The previous prime is 3421907. The next prime is 3421921. The reversal of 3421909 is 9091243.

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.

It is a cyclic number.

It is not a de Polignac number, because 3421909 - 2¹ = 3421907 is a prime.

It is a super-2 number, since 2×3421909² = 23418922408562, which contains 22 as substring.

It is a Duffinian number.

3421909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3421903) 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, 2899 + ... + 3904.

It is an arithmetic number, because the mean of its divisors is an integer number (857304).

Almost surely, 2^3421909 is an apocalyptic number.

It is an amenable number.

3421909 is a deficient number, since it is larger than the sum of its proper divisors (7307).

3421909 is an equidigital number, since it uses as much as digits as its factorization.

3421909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7306.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 3421909 is about 1849.8402633741. The cubic root of 3421909 is about 150.6917530952.

The spelling of 3421909 in words is "three million, four hundred twenty-one thousand, nine hundred nine".