4398717421 has 4 divisors (see below), whose sum is σ = 5027105632. Its totient is φ = 3770329212.

The previous prime is 4398717383. The next prime is 4398717443. The reversal of 4398717421 is 1247178934.

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 a de Polignac number, because none of the positive numbers 2^k-4398717421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4398717461) 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, 314194095 + ... + 314194108.

It is an arithmetic number, because the mean of its divisors is an integer number (1256776408).

Almost surely, 2^4398717421 is an apocalyptic number.

It is an amenable number.

4398717421 is a deficient number, since it is larger than the sum of its proper divisors (628388211).

4398717421 is an equidigital number, since it uses as much as digits as its factorization.

4398717421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628388210.

The product of its digits is 338688, while the sum is 46.

The square root of 4398717421 is about 66322.8272995053. The cubic root of 4398717421 is about 1638.4833069016.

The spelling of 4398717421 in words is "four billion, three hundred ninety-eight million, seven hundred seventeen thousand, four hundred twenty-one".