6860690989 has 2 divisors, whose sum is σ = 6860690990. Its totient is φ = 6860690988.

The previous prime is 6860690957. The next prime is 6860691001. The reversal of 6860690989 is 9890960686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6606926089 + 253764900 = 81283^2 + 15930^2 .

It is a cyclic number.

It is not a de Polignac number, because 6860690989 - 2⁵ = 6860690957 is a prime.

6860690989 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6860690939) 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, 3430345494 + 3430345495.

It is an arithmetic number, because the mean of its divisors is an integer number (3430345495).

Almost surely, 2^6860690989 is an apocalyptic number.

It is an amenable number.

6860690989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6860690989 is an equidigital number, since it uses as much as digits as its factorization.

6860690989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10077696, while the sum is 61.

The square root of 6860690989 is about 82829.2882318809. The cubic root of 6860690989 is about 1900.1561265056.

The spelling of 6860690989 in words is "six billion, eight hundred sixty million, six hundred ninety thousand, nine hundred eighty-nine".