8159081 has 4 divisors (see below), whose sum is σ = 9324672. Its totient is φ = 6993492.

The previous prime is 8159069. The next prime is 8159093. The reversal of 8159081 is 1809518.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1809518 = 2 ⋅904759.

It is an interprime number because it is at equal distance from previous prime (8159069) and next prime (8159093).

It is a cyclic number.

It is not a de Polignac number, because 8159081 - 2⁶ = 8159017 is a prime.

It is a super-2 number, since 2×8159081² = 133141205529122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8159681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582785 + ... + 582798.

It is an arithmetic number, because the mean of its divisors is an integer number (2331168).

Almost surely, 2^8159081 is an apocalyptic number.

It is an amenable number.

8159081 is a deficient number, since it is larger than the sum of its proper divisors (1165591).

8159081 is a wasteful number, since it uses less digits than its factorization.

8159081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165590.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 8159081 is about 2856.4105097132. The cubic root of 8159081 is about 201.3169837339.

The spelling of 8159081 in words is "eight million, one hundred fifty-nine thousand, eighty-one".