4287538621 has 2 divisors, whose sum is σ = 4287538622. Its totient is φ = 4287538620.

The previous prime is 4287538609. The next prime is 4287538649. The reversal of 4287538621 is 1268357824.

4287538621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2979631396 + 1307907225 = 54586^2 + 36165^2 .

It is a cyclic number.

It is not a de Polignac number, because 4287538621 - 2⁹ = 4287538109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4287538681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2143769310 + 2143769311.

It is an arithmetic number, because the mean of its divisors is an integer number (2143769311).

Almost surely, 2^4287538621 is an apocalyptic number.

It is an amenable number.

4287538621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4287538621 is an equidigital number, since it uses as much as digits as its factorization.

4287538621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 46.

The square root of 4287538621 is about 65479.2991792062. The cubic root of 4287538621 is about 1624.5609696492.

The spelling of 4287538621 in words is "four billion, two hundred eighty-seven million, five hundred thirty-eight thousand, six hundred twenty-one".