8021768093 has 2 divisors, whose sum is σ = 8021768094. Its totient is φ = 8021768092.

The previous prime is 8021768011. The next prime is 8021768123. The reversal of 8021768093 is 3908671208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5253640324 + 2768127769 = 72482^2 + 52613^2 .

It is a cyclic number.

It is not a de Polignac number, because 8021768093 - 2⁸ = 8021767837 is a prime.

It is a super-3 number, since 3×8021768093³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8021768693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010884046 + 4010884047.

It is an arithmetic number, because the mean of its divisors is an integer number (4010884047).

Almost surely, 2^8021768093 is an apocalyptic number.

It is an amenable number.

8021768093 is a deficient number, since it is larger than the sum of its proper divisors (1).

8021768093 is an equidigital number, since it uses as much as digits as its factorization.

8021768093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 8021768093 is about 89564.3237734758. The cubic root of 8021768093 is about 2001.8123649206.

The spelling of 8021768093 in words is "eight billion, twenty-one million, seven hundred sixty-eight thousand, ninety-three".