8047361921 has 2 divisors, whose sum is σ = 8047361922. Its totient is φ = 8047361920.

The previous prime is 8047361911. The next prime is 8047361977. The reversal of 8047361921 is 1291637408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6352887025 + 1694474896 = 79705^2 + 41164^2 .

It is a cyclic number.

It is not a de Polignac number, because 8047361921 - 2⁶ = 8047361857 is a prime.

It is not a weakly prime, because it can be changed into another prime (8047361911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4023680960 + 4023680961.

It is an arithmetic number, because the mean of its divisors is an integer number (4023680961).

Almost surely, 2^8047361921 is an apocalyptic number.

It is an amenable number.

8047361921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8047361921 is an equidigital number, since it uses as much as digits as its factorization.

8047361921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 8047361921 is about 89707.0895804785. The cubic root of 8047361921 is about 2003.9390635459.

The spelling of 8047361921 in words is "eight billion, forty-seven million, three hundred sixty-one thousand, nine hundred twenty-one".