9999803428273 has 2 divisors, whose sum is σ = 9999803428274. Its totient is φ = 9999803428272.

The previous prime is 9999803428211. The next prime is 9999803428283. The reversal of 9999803428273 is 3728243089999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9962406443584 + 37396984689 = 3156328^2 + 193383^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999803428273 - 2¹⁷ = 9999803297201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9999803428196 and 9999803428205.

It is not a weakly prime, because it can be changed into another prime (9999803428283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999901714136 + 4999901714137.

It is an arithmetic number, because the mean of its divisors is an integer number (4999901714137).

Almost surely, 2^{9999803428273} is an apocalyptic number.

It is an amenable number.

9999803428273 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999803428273 is an equidigital number, since it uses as much as digits as its factorization.

9999803428273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423263232, while the sum is 73.

The spelling of 9999803428273 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred three million, four hundred twenty-eight thousand, two hundred seventy-three".