4887747421 has 2 divisors, whose sum is σ = 4887747422. Its totient is φ = 4887747420.

The previous prime is 4887747413. The next prime is 4887747451. The reversal of 4887747421 is 1247477884.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2705456196 + 2182291225 = 52014^2 + 46715^2 .

It is a cyclic number.

It is not a de Polignac number, because 4887747421 - 2³ = 4887747413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4887747451) 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 as a sum of consecutive naturals, namely, 2443873710 + 2443873711.

It is an arithmetic number, because the mean of its divisors is an integer number (2443873711).

Almost surely, 2^4887747421 is an apocalyptic number.

It is an amenable number.

4887747421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4887747421 is an equidigital number, since it uses as much as digits as its factorization.

4887747421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2809856, while the sum is 52.

The square root of 4887747421 is about 69912.4267995326. The cubic root of 4887747421 is about 1697.0823565578.

The spelling of 4887747421 in words is "four billion, eight hundred eighty-seven million, seven hundred forty-seven thousand, four hundred twenty-one".