9998000777 has 2 divisors, whose sum is σ = 9998000778. Its totient is φ = 9998000776.

The previous prime is 9998000731. The next prime is 9998000783. The reversal of 9998000777 is 7770008999.

9998000777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8342812921 + 1655187856 = 91339^2 + 40684^2 .

It is a cyclic number.

It is not a de Polignac number, because 9998000777 - 2³² = 5703033481 is a prime.

It is not a weakly prime, because it can be changed into another prime (9998005777) 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, 4999000388 + 4999000389.

It is an arithmetic number, because the mean of its divisors is an integer number (4999000389).

Almost surely, 2^9998000777 is an apocalyptic number.

It is an amenable number.

9998000777 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998000777 is an equidigital number, since it uses as much as digits as its factorization.

9998000777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000376, while the sum is 56.

The square root of 9998000777 is about 99990.0033853385. The cubic root of 9998000777 is about 2154.2911072835.

The spelling of 9998000777 in words is "nine billion, nine hundred ninety-eight million, seven hundred seventy-seven", and thus it is an aban number.