9938613829 has 2 divisors, whose sum is σ = 9938613830. Its totient is φ = 9938613828.

The previous prime is 9938613827. The next prime is 9938613859. The reversal of 9938613829 is 9283168399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9865852929 + 72760900 = 99327^2 + 8530^2 .

It is a cyclic number.

It is not a de Polignac number, because 9938613829 - 2¹ = 9938613827 is a prime.

Together with 9938613827, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9938613823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4969306914 + 4969306915.

It is an arithmetic number, because the mean of its divisors is an integer number (4969306915).

Almost surely, 2^9938613829 is an apocalyptic number.

It is an amenable number.

9938613829 is a deficient number, since it is larger than the sum of its proper divisors (1).

9938613829 is an equidigital number, since it uses as much as digits as its factorization.

9938613829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 58.

The square root of 9938613829 is about 99692.5966609357. The cubic root of 9938613829 is about 2150.0172220722.

The spelling of 9938613829 in words is "nine billion, nine hundred thirty-eight million, six hundred thirteen thousand, eight hundred twenty-nine".