87560191 has 2 divisors, whose sum is σ = 87560192. Its totient is φ = 87560190.

The previous prime is 87560159. The next prime is 87560237. The reversal of 87560191 is 19106578.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87560191 - 2⁵ = 87560159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87560191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87560101) 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, 43780095 + 43780096.

It is an arithmetic number, because the mean of its divisors is an integer number (43780096).

Almost surely, 2^87560191 is an apocalyptic number.

87560191 is a deficient number, since it is larger than the sum of its proper divisors (1).

87560191 is an equidigital number, since it uses as much as digits as its factorization.

87560191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 87560191 is about 9357.3602581070. The cubic root of 87560191 is about 444.0537753091.

The spelling of 87560191 in words is "eighty-seven million, five hundred sixty thousand, one hundred ninety-one".