9930521137 has 2 divisors, whose sum is σ = 9930521138. Its totient is φ = 9930521136.

The previous prime is 9930521077. The next prime is 9930521213. The reversal of 9930521137 is 7311250399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6061556736 + 3868964401 = 77856^2 + 62201^2 .

It is a cyclic number.

It is not a de Polignac number, because 9930521137 - 2³¹ = 7783037489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9930521137.

It is not a weakly prime, because it can be changed into another prime (9930521737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965260568 + 4965260569.

It is an arithmetic number, because the mean of its divisors is an integer number (4965260569).

Almost surely, 2^9930521137 is an apocalyptic number.

It is an amenable number.

9930521137 is a deficient number, since it is larger than the sum of its proper divisors (1).

9930521137 is an equidigital number, since it uses as much as digits as its factorization.

9930521137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 9930521137 is about 99652.0001655762. Note that the first 3 decimals coincide. The cubic root of 9930521137 is about 2149.4335004317.

The spelling of 9930521137 in words is "nine billion, nine hundred thirty million, five hundred twenty-one thousand, one hundred thirty-seven".