9930345989 has 2 divisors, whose sum is σ = 9930345990. Its totient is φ = 9930345988.

The previous prime is 9930345941. The next prime is 9930346043. The reversal of 9930345989 is 9895430399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9790113025 + 140232964 = 98945^2 + 11842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9930345989 is a prime.

It is a super-2 number, since 2×9930345989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9930345389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965172994 + 4965172995.

It is an arithmetic number, because the mean of its divisors is an integer number (4965172995).

Almost surely, 2^9930345989 is an apocalyptic number.

It is an amenable number.

9930345989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9930345989 is an equidigital number, since it uses as much as digits as its factorization.

9930345989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9447840, while the sum is 59.

The square root of 9930345989 is about 99651.1213634849. The cubic root of 9930345989 is about 2149.4208635926.

The spelling of 9930345989 in words is "nine billion, nine hundred thirty million, three hundred forty-five thousand, nine hundred eighty-nine".