67893530821 has 2 divisors, whose sum is σ = 67893530822. Its totient is φ = 67893530820.

The previous prime is 67893530773. The next prime is 67893530839. The reversal of 67893530821 is 12803539876.

67893530821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39247968321 + 28645562500 = 198111^2 + 169250^2 .

It is a cyclic number.

It is not a de Polignac number, because 67893530821 - 2¹³ = 67893522629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67893530021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33946765410 + 33946765411.

It is an arithmetic number, because the mean of its divisors is an integer number (33946765411).

Almost surely, 2^67893530821 is an apocalyptic number.

It is an amenable number.

67893530821 is a deficient number, since it is larger than the sum of its proper divisors (1).

67893530821 is an equidigital number, since it uses as much as digits as its factorization.

67893530821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 67893530821 in words is "sixty-seven billion, eight hundred ninety-three million, five hundred thirty thousand, eight hundred twenty-one".