8071381 has 2 divisors, whose sum is σ = 8071382. Its totient is φ = 8071380.

The previous prime is 8071373. The next prime is 8071387. The reversal of 8071381 is 1831708.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8071281 + 100 = 2841^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 8071381 - 2³ = 8071373 is a prime.

It is a super-2 number, since 2×8071381² = 130294382494322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8071387) 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, 4035690 + 4035691.

It is an arithmetic number, because the mean of its divisors is an integer number (4035691).

Almost surely, 2^8071381 is an apocalyptic number.

It is an amenable number.

8071381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8071381 is an equidigital number, since it uses as much as digits as its factorization.

8071381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 8071381 is about 2841.0175993823. The cubic root of 8071381 is about 200.5930812017.

The spelling of 8071381 in words is "eight million, seventy-one thousand, three hundred eighty-one".