3629721 has 8 divisors (see below), whose sum is σ = 5124384. Its totient is φ = 2277440.

The previous prime is 3629719. The next prime is 3629729. The reversal of 3629721 is 1279263.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3629721 - 2¹ = 3629719 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3629729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35535 + ... + 35636.

It is an arithmetic number, because the mean of its divisors is an integer number (640548).

Almost surely, 2^3629721 is an apocalyptic number.

It is an amenable number.

3629721 is a deficient number, since it is larger than the sum of its proper divisors (1494663).

3629721 is a wasteful number, since it uses less digits than its factorization.

3629721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71191.

The product of its digits is 4536, while the sum is 30.

The square root of 3629721 is about 1905.1826684074. The cubic root of 3629721 is about 153.6824992875.

The spelling of 3629721 in words is "three million, six hundred twenty-nine thousand, seven hundred twenty-one".