87275191 has 2 divisors, whose sum is σ = 87275192. Its totient is φ = 87275190.

The previous prime is 87275143. The next prime is 87275203. The reversal of 87275191 is 19157278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87275191 - 2⁷ = 87275063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87275141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43637595 + 43637596.

It is an arithmetic number, because the mean of its divisors is an integer number (43637596).

Almost surely, 2^87275191 is an apocalyptic number.

87275191 is a deficient number, since it is larger than the sum of its proper divisors (1).

87275191 is an equidigital number, since it uses as much as digits as its factorization.

87275191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 40.

The square root of 87275191 is about 9342.1191921319. The cubic root of 87275191 is about 443.5714675319.

The spelling of 87275191 in words is "eighty-seven million, two hundred seventy-five thousand, one hundred ninety-one".