3649803 has 4 divisors (see below), whose sum is σ = 4866408. Its totient is φ = 2433200.

The previous prime is 3649777. The next prime is 3649831. The reversal of 3649803 is 3089463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3649803 - 2⁵ = 3649771 is a prime.

It is a D-number.

3649803 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3649003) 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, 608298 + ... + 608303.

It is an arithmetic number, because the mean of its divisors is an integer number (1216602).

Almost surely, 2^3649803 is an apocalyptic number.

3649803 is a deficient number, since it is larger than the sum of its proper divisors (1216605).

3649803 is a wasteful number, since it uses less digits than its factorization.

3649803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216604.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 3649803 is about 1910.4457595022. The cubic root of 3649803 is about 153.9654023589.

The spelling of 3649803 in words is "three million, six hundred forty-nine thousand, eight hundred three".