6839971 has 2 divisors, whose sum is σ = 6839972. Its totient is φ = 6839970.

The previous prime is 6839939. The next prime is 6839983. The reversal of 6839971 is 1799386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6839971 - 2⁵ = 6839939 is a prime.

It is not a weakly prime, because it can be changed into another prime (6839071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3419985 + 3419986.

It is an arithmetic number, because the mean of its divisors is an integer number (3419986).

Almost surely, 2^6839971 is an apocalyptic number.

6839971 is a deficient number, since it is larger than the sum of its proper divisors (1).

6839971 is an equidigital number, since it uses as much as digits as its factorization.

6839971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 6839971 is about 2615.3338219050. Note that the first 3 decimals coincide. The cubic root of 6839971 is about 189.8241308899.

The spelling of 6839971 in words is "six million, eight hundred thirty-nine thousand, nine hundred seventy-one".