9988937977 has 2 divisors, whose sum is σ = 9988937978. Its totient is φ = 9988937976.

The previous prime is 9988937951. The next prime is 9988938061. The reversal of 9988937977 is 7797398899.

It is a happy number.

9988937977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5560834041 + 4428103936 = 74571^2 + 66544^2 .

It is a cyclic number.

It is not a de Polignac number, because 9988937977 - 2¹⁵ = 9988905209 is a prime.

It is not a weakly prime, because it can be changed into another prime (9988937377) 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, 4994468988 + 4994468989.

It is an arithmetic number, because the mean of its divisors is an integer number (4994468989).

Almost surely, 2^9988937977 is an apocalyptic number.

It is an amenable number.

9988937977 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988937977 is an equidigital number, since it uses as much as digits as its factorization.

9988937977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432081216, while the sum is 76.

The square root of 9988937977 is about 99944.6745804898. The cubic root of 9988937977 is about 2153.6399833879.

The spelling of 9988937977 in words is "nine billion, nine hundred eighty-eight million, nine hundred thirty-seven thousand, nine hundred seventy-seven".