6928946021 has 2 divisors, whose sum is σ = 6928946022. Its totient is φ = 6928946020.

The previous prime is 6928946009. The next prime is 6928946023. The reversal of 6928946021 is 1206498296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6805425025 + 123520996 = 82495^2 + 11114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6928946021 is a prime.

Together with 6928946023, 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 (6928946023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3464473010 + 3464473011.

It is an arithmetic number, because the mean of its divisors is an integer number (3464473011).

Almost surely, 2^6928946021 is an apocalyptic number.

It is an amenable number.

6928946021 is a deficient number, since it is larger than the sum of its proper divisors (1).

6928946021 is an equidigital number, since it uses as much as digits as its factorization.

6928946021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 6928946021 is about 83240.2908512458. The cubic root of 6928946021 is about 1906.4367124741.

The spelling of 6928946021 in words is "six billion, nine hundred twenty-eight million, nine hundred forty-six thousand, twenty-one".