8158291 has 2 divisors, whose sum is σ = 8158292. Its totient is φ = 8158290.

The previous prime is 8158289. The next prime is 8158331. The reversal of 8158291 is 1928518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8158291 - 2¹ = 8158289 is a prime.

Together with 8158289, it forms a pair of twin primes.

It is an Ulam number.

8158291 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8158211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4079145 + 4079146.

It is an arithmetic number, because the mean of its divisors is an integer number (4079146).

Almost surely, 2^8158291 is an apocalyptic number.

8158291 is a deficient number, since it is larger than the sum of its proper divisors (1).

8158291 is an equidigital number, since it uses as much as digits as its factorization.

8158291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 34.

The square root of 8158291 is about 2856.2722209201. The cubic root of 8158291 is about 201.3104860434.

The spelling of 8158291 in words is "eight million, one hundred fifty-eight thousand, two hundred ninety-one".