3649629 has 4 divisors (see below), whose sum is σ = 4866176. Its totient is φ = 2433084.

The previous prime is 3649609. The next prime is 3649637. The reversal of 3649629 is 9269463.

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 not a de Polignac number, because 3649629 - 2¹² = 3645533 is a prime.

It is a d-powerful number, because it can be written as 3¹¹ + 6⁶ + 4¹⁰ + 9² + 6⁷ + 2²¹ + 9² .

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649609) 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, 608269 + ... + 608274.

It is an arithmetic number, because the mean of its divisors is an integer number (1216544).

Almost surely, 2^3649629 is an apocalyptic number.

It is an amenable number.

3649629 is a deficient number, since it is larger than the sum of its proper divisors (1216547).

3649629 is a wasteful number, since it uses less digits than its factorization.

3649629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216546.

The product of its digits is 69984, while the sum is 39.

The square root of 3649629 is about 1910.4002198492. The cubic root of 3649629 is about 153.9629556144.

It can be divided in two parts, 3649 and 629, that added together give a triangular number (4278 = T₉₂).

The spelling of 3649629 in words is "three million, six hundred forty-nine thousand, six hundred twenty-nine".