9999888677 has 2 divisors, whose sum is σ = 9999888678. Its totient is φ = 9999888676.

The previous prime is 9999888653. The next prime is 9999888719. The reversal of 9999888677 is 7768889999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5831765956 + 4168122721 = 76366^2 + 64561^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999888677 - 2¹² = 9999884581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999882677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999944338 + 4999944339.

It is an arithmetic number, because the mean of its divisors is an integer number (4999944339).

Almost surely, 2^9999888677 is an apocalyptic number.

It is an amenable number.

9999888677 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999888677 is an equidigital number, since it uses as much as digits as its factorization.

9999888677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987614208, while the sum is 80.

The square root of 9999888677 is about 99999.4433834509. The cubic root of 9999888677 is about 2154.4266953978.

The spelling of 9999888677 in words is "nine billion, nine hundred ninety-nine million, eight hundred eighty-eight thousand, six hundred seventy-seven".