4379888621 has 2 divisors, whose sum is σ = 4379888622. Its totient is φ = 4379888620.

The previous prime is 4379888603. The next prime is 4379888657. The reversal of 4379888621 is 1268889734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4328192521 + 51696100 = 65789^2 + 7190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4379888621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4379888671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2189944310 + 2189944311.

It is an arithmetic number, because the mean of its divisors is an integer number (2189944311).

Almost surely, 2^4379888621 is an apocalyptic number.

It is an amenable number.

4379888621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4379888621 is an equidigital number, since it uses as much as digits as its factorization.

4379888621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 56.

The square root of 4379888621 is about 66180.7269603470. The cubic root of 4379888621 is about 1636.1421094196.

The spelling of 4379888621 in words is "four billion, three hundred seventy-nine million, eight hundred eighty-eight thousand, six hundred twenty-one".