8151391 has 2 divisors, whose sum is σ = 8151392. Its totient is φ = 8151390.

The previous prime is 8151383. The next prime is 8151397. The reversal of 8151391 is 1931518.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8151391 - 2³ = 8151383 is a prime.

It is a Chen prime.

It is equal to p₅₄₉₂₅₃ and since 8151391 and 549253 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8151397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4075695 + 4075696.

It is an arithmetic number, because the mean of its divisors is an integer number (4075696).

Almost surely, 2^8151391 is an apocalyptic number.

8151391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8151391 is an equidigital number, since it uses as much as digits as its factorization.

8151391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 28.

The square root of 8151391 is about 2855.0640973540. The cubic root of 8151391 is about 201.2537162232.

The spelling of 8151391 in words is "eight million, one hundred fifty-one thousand, three hundred ninety-one".