4621479721 has 4 divisors (see below), whose sum is σ = 4770559744. Its totient is φ = 4472399700.

The previous prime is 4621479719. The next prime is 4621479749. The reversal of 4621479721 is 1279741264.

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 a cyclic number.

It is not a de Polignac number, because 4621479721 - 2¹ = 4621479719 is a prime.

It is a super-2 number, since 2×4621479721² = 42716149623228475682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4621479781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74539965 + ... + 74540026.

It is an arithmetic number, because the mean of its divisors is an integer number (1192639936).

Almost surely, 2^4621479721 is an apocalyptic number.

It is an amenable number.

4621479721 is a deficient number, since it is larger than the sum of its proper divisors (149080023).

4621479721 is a wasteful number, since it uses less digits than its factorization.

4621479721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149080022.

The product of its digits is 169344, while the sum is 43.

The square root of 4621479721 is about 67981.4660109651. The cubic root of 4621479721 is about 1665.6881031917.

The spelling of 4621479721 in words is "four billion, six hundred twenty-one million, four hundred seventy-nine thousand, seven hundred twenty-one".