9306871049821 has 2 divisors, whose sum is σ = 9306871049822. Its totient is φ = 9306871049820.

The previous prime is 9306871049813. The next prime is 9306871049831. The reversal of 9306871049821 is 1289401786039.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8765513556921 + 541357492900 = 2960661^2 + 735770^2 .

It is a cyclic number.

It is not a de Polignac number, because 9306871049821 - 2³ = 9306871049813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9306871049831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4653435524910 + 4653435524911.

It is an arithmetic number, because the mean of its divisors is an integer number (4653435524911).

Almost surely, 2^{9306871049821} is an apocalyptic number.

It is an amenable number.

9306871049821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9306871049821 is an equidigital number, since it uses as much as digits as its factorization.

9306871049821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 9306871049821 in words is "nine trillion, three hundred six billion, eight hundred seventy-one million, forty-nine thousand, eight hundred twenty-one".