6006389021 has 2 divisors, whose sum is σ = 6006389022. Its totient is φ = 6006389020.

The previous prime is 6006389009. The next prime is 6006389023. The reversal of 6006389021 is 1209836006.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5000611225 + 1005777796 = 70715^2 + 31714^2 .

It is a cyclic number.

It is not a de Polignac number, because 6006389021 - 2³⁰ = 4932647197 is a prime.

Together with 6006389023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6006389023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3003194510 + 3003194511.

It is an arithmetic number, because the mean of its divisors is an integer number (3003194511).

Almost surely, 2^6006389021 is an apocalyptic number.

It is an amenable number.

6006389021 is a deficient number, since it is larger than the sum of its proper divisors (1).

6006389021 is an equidigital number, since it uses as much as digits as its factorization.

6006389021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 6006389021 is about 77500.8969044875. The cubic root of 6006389021 is about 1817.7653430143.

The spelling of 6006389021 in words is "six billion, six million, three hundred eighty-nine thousand, twenty-one".