6859649117 has 2 divisors, whose sum is σ = 6859649118. Its totient is φ = 6859649116.

The previous prime is 6859649051. The next prime is 6859649119. The reversal of 6859649117 is 7119469586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6337115236 + 522533881 = 79606^2 + 22859^2 .

It is a cyclic number.

It is not a de Polignac number, because 6859649117 - 2¹⁰ = 6859648093 is a prime.

Together with 6859649119, 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 (6859649119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3429824558 + 3429824559.

It is an arithmetic number, because the mean of its divisors is an integer number (3429824559).

Almost surely, 2^6859649117 is an apocalyptic number.

It is an amenable number.

6859649117 is a deficient number, since it is larger than the sum of its proper divisors (1).

6859649117 is an equidigital number, since it uses as much as digits as its factorization.

6859649117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 6859649117 is about 82822.9987201623. The cubic root of 6859649117 is about 1900.0599350438.

The spelling of 6859649117 in words is "six billion, eight hundred fifty-nine million, six hundred forty-nine thousand, one hundred seventeen".