8020381 has 2 divisors, whose sum is σ = 8020382. Its totient is φ = 8020380.

The previous prime is 8020361. The next prime is 8020387. The reversal of 8020381 is 1830208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4372281 + 3648100 = 2091^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 8020381 - 2⁷ = 8020253 is a prime.

It is a super-2 number, since 2×8020381² = 128653022770322, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8020387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010190 + 4010191.

It is an arithmetic number, because the mean of its divisors is an integer number (4010191).

Almost surely, 2^8020381 is an apocalyptic number.

It is an amenable number.

8020381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8020381 is an equidigital number, since it uses as much as digits as its factorization.

8020381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 8020381 is about 2832.0277187909. The cubic root of 8020381 is about 200.1696976395.

Adding to 8020381 its reverse (1830208), we get a palindrome (9850589).

The spelling of 8020381 in words is "eight million, twenty thousand, three hundred eighty-one".