9345164821 has 2 divisors, whose sum is σ = 9345164822. Its totient is φ = 9345164820.

The previous prime is 9345164819. The next prime is 9345164849. The reversal of 9345164821 is 1284615439.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5272938225 + 4072226596 = 72615^2 + 63814^2 .

It is a cyclic number.

It is not a de Polignac number, because 9345164821 - 2¹ = 9345164819 is a prime.

Together with 9345164819, 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 (9345164921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4672582410 + 4672582411.

It is an arithmetic number, because the mean of its divisors is an integer number (4672582411).

Almost surely, 2^9345164821 is an apocalyptic number.

It is an amenable number.

9345164821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9345164821 is an equidigital number, since it uses as much as digits as its factorization.

9345164821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 9345164821 is about 96670.3926804893. The cubic root of 9345164821 is about 2106.3424893936.

The spelling of 9345164821 in words is "nine billion, three hundred forty-five million, one hundred sixty-four thousand, eight hundred twenty-one".