9929329381 has 2 divisors, whose sum is σ = 9929329382. Its totient is φ = 9929329380.

The previous prime is 9929329367. The next prime is 9929329469. The reversal of 9929329381 is 1839239299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8865917281 + 1063412100 = 94159^2 + 32610^2 .

It is a cyclic number.

It is not a de Polignac number, because 9929329381 - 2¹⁹ = 9928805093 is a prime.

It is a super-2 number, since 2×9929329381² (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 (9929329321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4964664690 + 4964664691.

It is an arithmetic number, because the mean of its divisors is an integer number (4964664691).

Almost surely, 2^9929329381 is an apocalyptic number.

It is an amenable number.

9929329381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9929329381 is an equidigital number, since it uses as much as digits as its factorization.

9929329381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 55.

The square root of 9929329381 is about 99646.0203972040. The cubic root of 9929329381 is about 2149.3475129085.

The spelling of 9929329381 in words is "nine billion, nine hundred twenty-nine million, three hundred twenty-nine thousand, three hundred eighty-one".