4663721 has 8 divisors (see below), whose sum is σ = 4929600. Its totient is φ = 4399920.

The previous prime is 4663717. The next prime is 4663727. The reversal of 4663721 is 1273664.

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 4663721 - 2² = 4663717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4663727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7076 + ... + 7706.

It is an arithmetic number, because the mean of its divisors is an integer number (616200).

Almost surely, 2^4663721 is an apocalyptic number.

It is an amenable number.

4663721 is a deficient number, since it is larger than the sum of its proper divisors (265879).

4663721 is a wasteful number, since it uses less digits than its factorization.

4663721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039.

The product of its digits is 6048, while the sum is 29.

The square root of 4663721 is about 2159.5650024947. The cubic root of 4663721 is about 167.0747630396.

The spelling of 4663721 in words is "four million, six hundred sixty-three thousand, seven hundred twenty-one".