87911 has 2 divisors, whose sum is σ = 87912. Its totient is φ = 87910.

The previous prime is 87887. The next prime is 87917. The reversal of 87911 is 11978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87911 - 2¹⁴ = 71527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43955 + 43956.

It is an arithmetic number, because the mean of its divisors is an integer number (43956).

2⁸⁷⁹¹¹ is an apocalyptic number.

87911 is a deficient number, since it is larger than the sum of its proper divisors (1).

87911 is an equidigital number, since it uses as much as digits as its factorization.

87911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 26.

The square root of 87911 is about 296.4978920667. The cubic root of 87911 is about 44.4646017361.

It can be divided in two parts, 879 and 11, that multiplied together give a palindrome (9669).

The spelling of 87911 in words is "eighty-seven thousand, nine hundred eleven".