6985885877 has 2 divisors, whose sum is σ = 6985885878. Its totient is φ = 6985885876.

The previous prime is 6985885801. The next prime is 6985885883. The reversal of 6985885877 is 7785885896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6321999121 + 663886756 = 79511^2 + 25766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6985885877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6985885877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6985885177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3492942938 + 3492942939.

It is an arithmetic number, because the mean of its divisors is an integer number (3492942939).

Almost surely, 2^6985885877 is an apocalyptic number.

It is an amenable number.

6985885877 is a deficient number, since it is larger than the sum of its proper divisors (1).

6985885877 is an equidigital number, since it uses as much as digits as its factorization.

6985885877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270950400, while the sum is 71.

The square root of 6985885877 is about 83581.6120746663. The cubic root of 6985885877 is about 1911.6446345510.

The spelling of 6985885877 in words is "six billion, nine hundred eighty-five million, eight hundred eighty-five thousand, eight hundred seventy-seven".