7871191 has 2 divisors, whose sum is σ = 7871192. Its totient is φ = 7871190.

The previous prime is 7871183. The next prime is 7871197. The reversal of 7871191 is 1911787.

It is a strong prime.

It is an emirp because it is prime and its reverse (1911787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7871191 - 2³ = 7871183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7871197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3935595 + 3935596.

It is an arithmetic number, because the mean of its divisors is an integer number (3935596).

Almost surely, 2^7871191 is an apocalyptic number.

7871191 is a deficient number, since it is larger than the sum of its proper divisors (1).

7871191 is an equidigital number, since it uses as much as digits as its factorization.

7871191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 34.

The square root of 7871191 is about 2805.5642926157. The cubic root of 7871191 is about 198.9207785469.

The spelling of 7871191 in words is "seven million, eight hundred seventy-one thousand, one hundred ninety-one".