6860388209 has 2 divisors, whose sum is σ = 6860388210. Its totient is φ = 6860388208.

The previous prime is 6860388193. The next prime is 6860388247. The reversal of 6860388209 is 9028830686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6198097984 + 662290225 = 78728^2 + 25735^2 .

It is a cyclic number.

It is not a de Polignac number, because 6860388209 - 2⁴ = 6860388193 is a prime.

It is not a weakly prime, because it can be changed into another prime (6860388109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3430194104 + 3430194105.

It is an arithmetic number, because the mean of its divisors is an integer number (3430194105).

Almost surely, 2^6860388209 is an apocalyptic number.

It is an amenable number.

6860388209 is a deficient number, since it is larger than the sum of its proper divisors (1).

6860388209 is an equidigital number, since it uses as much as digits as its factorization.

6860388209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 6860388209 is about 82827.4604765835. The cubic root of 6860388209 is about 1900.1281731631.

The spelling of 6860388209 in words is "six billion, eight hundred sixty million, three hundred eighty-eight thousand, two hundred nine".