8158919 has 2 divisors, whose sum is σ = 8158920. Its totient is φ = 8158918.

The previous prime is 8158879. The next prime is 8158967. The reversal of 8158919 is 9198518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8158919 - 2⁸ = 8158663 is a prime.

It is a super-2 number, since 2×8158919² = 133135918497122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8118919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4079459 + 4079460.

It is an arithmetic number, because the mean of its divisors is an integer number (4079460).

Almost surely, 2^8158919 is an apocalyptic number.

8158919 is a deficient number, since it is larger than the sum of its proper divisors (1).

8158919 is an equidigital number, since it uses as much as digits as its factorization.

8158919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 41.

The square root of 8158919 is about 2856.3821523039. The cubic root of 8158919 is about 201.3156513303.

The spelling of 8158919 in words is "eight million, one hundred fifty-eight thousand, nine hundred nineteen".