9930521077 has 2 divisors, whose sum is σ = 9930521078. Its totient is φ = 9930521076.

The previous prime is 9930521063. The next prime is 9930521137. The reversal of 9930521077 is 7701250399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7388949681 + 2541571396 = 85959^2 + 50414^2 .

It is a cyclic number.

It is not a de Polignac number, because 9930521077 - 2¹⁹ = 9929996789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9930521677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965260538 + 4965260539.

It is an arithmetic number, because the mean of its divisors is an integer number (4965260539).

Almost surely, 2^9930521077 is an apocalyptic number.

It is an amenable number.

9930521077 is a deficient number, since it is larger than the sum of its proper divisors (1).

9930521077 is an equidigital number, since it uses as much as digits as its factorization.

9930521077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119070, while the sum is 43.

The square root of 9930521077 is about 99651.9998645286. Note that the first 3 decimals coincide. The cubic root of 9930521077 is about 2149.4334961027.

The spelling of 9930521077 in words is "nine billion, nine hundred thirty million, five hundred twenty-one thousand, seventy-seven".