4478314921 has 4 divisors (see below), whose sum is σ = 4487290000. Its totient is φ = 4469339844.

The previous prime is 4478314891. The next prime is 4478314979. The reversal of 4478314921 is 1294138744.

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 4478314921 - 2⁹ = 4478314409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4478344921) 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, 4486791 + ... + 4487788.

It is an arithmetic number, because the mean of its divisors is an integer number (1121822500).

Almost surely, 2^4478314921 is an apocalyptic number.

It is an amenable number.

4478314921 is a deficient number, since it is larger than the sum of its proper divisors (8975079).

4478314921 is an equidigital number, since it uses as much as digits as its factorization.

4478314921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8975078.

The product of its digits is 193536, while the sum is 43.

The square root of 4478314921 is about 66920.2130973893. The cubic root of 4478314921 is about 1648.3074067626.

The spelling of 4478314921 in words is "four billion, four hundred seventy-eight million, three hundred fourteen thousand, nine hundred twenty-one".