6839107421 has 2 divisors, whose sum is σ = 6839107422. Its totient is φ = 6839107420.

The previous prime is 6839107409. The next prime is 6839107423. The reversal of 6839107421 is 1247019386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4433695396 + 2405412025 = 66586^2 + 49045^2 .

It is a cyclic number.

It is not a de Polignac number, because 6839107421 - 2¹⁴ = 6839091037 is a prime.

Together with 6839107423, 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 (6839107423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3419553710 + 3419553711.

It is an arithmetic number, because the mean of its divisors is an integer number (3419553711).

Almost surely, 2^6839107421 is an apocalyptic number.

It is an amenable number.

6839107421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6839107421 is an equidigital number, since it uses as much as digits as its factorization.

6839107421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 6839107421 is about 82698.8961292713. The cubic root of 6839107421 is about 1898.1614181931.

The spelling of 6839107421 in words is "six billion, eight hundred thirty-nine million, one hundred seven thousand, four hundred twenty-one".