6408071939 has 2 divisors, whose sum is σ = 6408071940. Its totient is φ = 6408071938.

The previous prime is 6408071897. The next prime is 6408071941. The reversal of 6408071939 is 9391708046.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6408071939 is a prime.

Together with 6408071941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6408071893 and 6408071902.

It is not a weakly prime, because it can be changed into another prime (6408071339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3204035969 + 3204035970.

It is an arithmetic number, because the mean of its divisors is an integer number (3204035970).

Almost surely, 2^6408071939 is an apocalyptic number.

6408071939 is a deficient number, since it is larger than the sum of its proper divisors (1).

6408071939 is an equidigital number, since it uses as much as digits as its factorization.

6408071939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 6408071939 is about 80050.4337214983. The cubic root of 6408071939 is about 1857.4157601427.

The spelling of 6408071939 in words is "six billion, four hundred eight million, seventy-one thousand, nine hundred thirty-nine".