6986889869 has 2 divisors, whose sum is σ = 6986889870. Its totient is φ = 6986889868.

The previous prime is 6986889853. The next prime is 6986889941. The reversal of 6986889869 is 9689886896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5480440900 + 1506448969 = 74030^2 + 38813^2 .

It is a cyclic number.

It is not a de Polignac number, because 6986889869 - 2⁴ = 6986889853 is a prime.

It is a super-2 number, since 2×6986889869² = 97633260083069674322, which contains 22 as substring.

It is a Sophie Germain prime.

6986889869 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6986889869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6986889269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3493444934 + 3493444935.

It is an arithmetic number, because the mean of its divisors is an integer number (3493444935).

Almost surely, 2^6986889869 is an apocalyptic number.

It is an amenable number.

6986889869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6986889869 is an equidigital number, since it uses as much as digits as its factorization.

6986889869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 644972544, while the sum is 77.

The square root of 6986889869 is about 83587.6179167704. The cubic root of 6986889869 is about 1911.7362089062.

The spelling of 6986889869 in words is "six billion, nine hundred eighty-six million, eight hundred eighty-nine thousand, eight hundred sixty-nine".