3543649 has 4 divisors (see below), whose sum is σ = 3548464. Its totient is φ = 3538836.

The previous prime is 3543643. The next prime is 3543677. The reversal of 3543649 is 9463453.

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 3543649 - 2¹⁹ = 3019361 is a prime.

It is a Duffinian number.

3543649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3543643) 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, 1047 + ... + 2860.

It is an arithmetic number, because the mean of its divisors is an integer number (887116).

Almost surely, 2^3543649 is an apocalyptic number.

It is an amenable number.

3543649 is a deficient number, since it is larger than the sum of its proper divisors (4815).

3543649 is an equidigital number, since it uses as much as digits as its factorization.

3543649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4814.

The product of its digits is 38880, while the sum is 34.

The square root of 3543649 is about 1882.4582332684. The cubic root of 3543649 is about 152.4580050988.

The spelling of 3543649 in words is "three million, five hundred forty-three thousand, six hundred forty-nine".