6858805997 has 2 divisors, whose sum is σ = 6858805998. Its totient is φ = 6858805996.

The previous prime is 6858805981. The next prime is 6858806033. The reversal of 6858805997 is 7995088586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3926150281 + 2932655716 = 62659^2 + 54154^2 .

It is a cyclic number.

It is not a de Polignac number, because 6858805997 - 2⁴ = 6858805981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6858805957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3429402998 + 3429402999.

It is an arithmetic number, because the mean of its divisors is an integer number (3429402999).

Almost surely, 2^6858805997 is an apocalyptic number.

It is an amenable number.

6858805997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6858805997 is an equidigital number, since it uses as much as digits as its factorization.

6858805997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43545600, while the sum is 65.

The square root of 6858805997 is about 82817.9086731849. The cubic root of 6858805997 is about 1899.9820863500.

The spelling of 6858805997 in words is "six billion, eight hundred fifty-eight million, eight hundred five thousand, nine hundred ninety-seven".