6986038687021 has 2 divisors, whose sum is σ = 6986038687022. Its totient is φ = 6986038687020.

The previous prime is 6986038687013. The next prime is 6986038687031. The reversal of 6986038687021 is 1207868306896.

6986038687021 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., 6951817756900 + 34220930121 = 2636630^2 + 184989^2 .

It is a cyclic number.

It is not a de Polignac number, because 6986038687021 - 2³ = 6986038687013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6986038687031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3493019343510 + 3493019343511.

It is an arithmetic number, because the mean of its divisors is an integer number (3493019343511).

Almost surely, 2^{6986038687021} is an apocalyptic number.

It is an amenable number.

6986038687021 is a deficient number, since it is larger than the sum of its proper divisors (1).

6986038687021 is an equidigital number, since it uses as much as digits as its factorization.

6986038687021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 64.

The spelling of 6986038687021 in words is "six trillion, nine hundred eighty-six billion, thirty-eight million, six hundred eighty-seven thousand, twenty-one".