9986394877 has 2 divisors, whose sum is σ = 9986394878. Its totient is φ = 9986394876.

The previous prime is 9986394833. The next prime is 9986394893. The reversal of 9986394877 is 7784936899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8627808996 + 1358585881 = 92886^2 + 36859^2 .

It is a cyclic number.

It is not a de Polignac number, because 9986394877 - 2⁷ = 9986394749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9986394377) 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, 4993197438 + 4993197439.

It is an arithmetic number, because the mean of its divisors is an integer number (4993197439).

Almost surely, 2^9986394877 is an apocalyptic number.

It is an amenable number.

9986394877 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986394877 is an equidigital number, since it uses as much as digits as its factorization.

9986394877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164602368, while the sum is 70.

The square root of 9986394877 is about 99931.9512318257. The cubic root of 9986394877 is about 2153.4572016377.

The spelling of 9986394877 in words is "nine billion, nine hundred eighty-six million, three hundred ninety-four thousand, eight hundred seventy-seven".