9999872745829 has 2 divisors, whose sum is σ = 9999872745830. Its totient is φ = 9999872745828.

The previous prime is 9999872745773. The next prime is 9999872745847. The reversal of 9999872745829 is 9285472789999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9806010417025 + 193862328804 = 3131455^2 + 440298^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999872745829 - 2⁴¹ = 7800849490277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9999872745829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999872745869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999936372914 + 4999936372915.

It is an arithmetic number, because the mean of its divisors is an integer number (4999936372915).

Almost surely, 2^{9999872745829} is an apocalyptic number.

It is an amenable number.

9999872745829 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999872745829 is an equidigital number, since it uses as much as digits as its factorization.

9999872745829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14814213120, while the sum is 88.

The spelling of 9999872745829 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred seventy-two million, seven hundred forty-five thousand, eight hundred twenty-nine".