3649409 has 4 divisors (see below), whose sum is σ = 3727104. Its totient is φ = 3571716.

The previous prime is 3649403. The next prime is 3649411. The reversal of 3649409 is 9049463.

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: 9049463 = 1499 ⋅6037.

It is a cyclic number.

It is not a de Polignac number, because 3649409 - 2⁸ = 3649153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3649403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38777 + ... + 38870.

It is an arithmetic number, because the mean of its divisors is an integer number (931776).

Almost surely, 2^3649409 is an apocalyptic number.

It is an amenable number.

3649409 is a deficient number, since it is larger than the sum of its proper divisors (77695).

3649409 is an equidigital number, since it uses as much as digits as its factorization.

3649409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77694.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 3649409 is about 1910.3426394236. The cubic root of 3649409 is about 153.9598619181.

The spelling of 3649409 in words is "three million, six hundred forty-nine thousand, four hundred nine".