6127878989 has 2 divisors, whose sum is σ = 6127878990. Its totient is φ = 6127878988.

The previous prime is 6127878949. The next prime is 6127879033. The reversal of 6127878989 is 9898787216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4908123364 + 1219755625 = 70058^2 + 34925^2 .

It is a cyclic number.

It is not a de Polignac number, because 6127878989 - 2³² = 1832911693 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6127878949) 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, 3063939494 + 3063939495.

It is an arithmetic number, because the mean of its divisors is an integer number (3063939495).

Almost surely, 2^6127878989 is an apocalyptic number.

It is an amenable number.

6127878989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6127878989 is an equidigital number, since it uses as much as digits as its factorization.

6127878989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 65.

The square root of 6127878989 is about 78280.7702376516. The cubic root of 6127878989 is about 1829.9394795198.

The spelling of 6127878989 in words is "six billion, one hundred twenty-seven million, eight hundred seventy-eight thousand, nine hundred eighty-nine".