9226860821 has 2 divisors, whose sum is σ = 9226860822. Its totient is φ = 9226860820.

The previous prime is 9226860809. The next prime is 9226860871. The reversal of 9226860821 is 1280686229.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9161169796 + 65691025 = 95714^2 + 8105^2 .

It is a cyclic number.

It is not a de Polignac number, because 9226860821 - 2¹⁸ = 9226598677 is a prime.

It is a super-2 number, since 2×9226860821² (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 (9226860871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4613430410 + 4613430411.

It is an arithmetic number, because the mean of its divisors is an integer number (4613430411).

Almost surely, 2^9226860821 is an apocalyptic number.

It is an amenable number.

9226860821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9226860821 is an equidigital number, since it uses as much as digits as its factorization.

9226860821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 9226860821 is about 96056.5501202287. The cubic root of 9226860821 is about 2097.4163858924.

The spelling of 9226860821 in words is "nine billion, two hundred twenty-six million, eight hundred sixty thousand, eight hundred twenty-one".