8091481 has 2 divisors, whose sum is σ = 8091482. Its totient is φ = 8091480.

The previous prime is 8091451. The next prime is 8091491. The reversal of 8091481 is 1841908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7425625 + 665856 = 2725^2 + 816^2 .

It is a cyclic number.

It is not a de Polignac number, because 8091481 - 2¹³ = 8083289 is a prime.

It is a super-2 number, since 2×8091481² = 130944129546722, which contains 22 as substring.

8091481 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8091431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045740 + 4045741.

It is an arithmetic number, because the mean of its divisors is an integer number (4045741).

Almost surely, 2^8091481 is an apocalyptic number.

It is an amenable number.

8091481 is a deficient number, since it is larger than the sum of its proper divisors (1).

8091481 is an equidigital number, since it uses as much as digits as its factorization.

8091481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 8091481 is about 2844.5528646872. The cubic root of 8091481 is about 200.7594541633.

The spelling of 8091481 in words is "eight million, ninety-one thousand, four hundred eighty-one".