8020981 has 2 divisors, whose sum is σ = 8020982. Its totient is φ = 8020980.

The previous prime is 8020963. The next prime is 8020993. The reversal of 8020981 is 1890208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7700625 + 320356 = 2775^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 8020981 - 2¹³ = 8012789 is a prime.

It is a super-2 number, since 2×8020981² = 128672272404722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8020921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010490 + 4010491.

It is an arithmetic number, because the mean of its divisors is an integer number (4010491).

Almost surely, 2^8020981 is an apocalyptic number.

It is an amenable number.

8020981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8020981 is an equidigital number, since it uses as much as digits as its factorization.

8020981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 8020981 is about 2832.1336479764. The cubic root of 8020981 is about 200.1746890409.

The spelling of 8020981 in words is "eight million, twenty thousand, nine hundred eighty-one".