3649723 has 24 divisors (see below), whose sum is σ = 4766720. Its totient is φ = 2732400.

The previous prime is 3649699. The next prime is 3649741. The reversal of 3649723 is 3279463.

It is not a de Polignac number, because 3649723 - 2¹⁷ = 3518651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3649753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26188 + ... + 26326.

Almost surely, 2^3649723 is an apocalyptic number.

3649723 is a deficient number, since it is larger than the sum of its proper divisors (1116997).

3649723 is a wasteful number, since it uses less digits than its factorization.

3649723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 188 counting only the distinct ones).

The product of its digits is 27216, while the sum is 34.

The square root of 3649723 is about 1910.4248218655. The cubic root of 3649723 is about 153.9642774285.

The spelling of 3649723 in words is "three million, six hundred forty-nine thousand, seven hundred twenty-three".