6806813639 has 2 divisors, whose sum is σ = 6806813640. Its totient is φ = 6806813638.

The previous prime is 6806813599. The next prime is 6806813641. The reversal of 6806813639 is 9363186086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6806813639 - 2⁸ = 6806813383 is a prime.

Together with 6806813641, 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 (6806810639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3403406819 + 3403406820.

It is an arithmetic number, because the mean of its divisors is an integer number (3403406820).

Almost surely, 2^6806813639 is an apocalyptic number.

6806813639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6806813639 is an equidigital number, since it uses as much as digits as its factorization.

6806813639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 6806813639 is about 82503.4159232210. The cubic root of 6806813639 is about 1895.1690419444.

The spelling of 6806813639 in words is "six billion, eight hundred six million, eight hundred thirteen thousand, six hundred thirty-nine".