4229887721 has 4 divisors (see below), whose sum is σ = 4366335744. Its totient is φ = 4093439700.

The previous prime is 4229887679. The next prime is 4229887747. The reversal of 4229887721 is 1277889224.

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 4229887721 - 2¹⁰ = 4229886697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4229887721.

It is not an unprimeable number, because it can be changed into a prime (4229887121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68223965 + ... + 68224026.

It is an arithmetic number, because the mean of its divisors is an integer number (1091583936).

Almost surely, 2^4229887721 is an apocalyptic number.

It is an amenable number.

4229887721 is a deficient number, since it is larger than the sum of its proper divisors (136448023).

4229887721 is a wasteful number, since it uses less digits than its factorization.

4229887721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136448022.

The product of its digits is 903168, while the sum is 50.

The square root of 4229887721 is about 65037.5869862959. The cubic root of 4229887721 is about 1617.2467231212.

The spelling of 4229887721 in words is "four billion, two hundred twenty-nine million, eight hundred eighty-seven thousand, seven hundred twenty-one".