71887 has 2 divisors, whose sum is σ = 71888. Its totient is φ = 71886.

The previous prime is 71881. The next prime is 71899. The reversal of 71887 is 78817.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71887 - 2³ = 71879 is a prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35943 + 35944.

It is an arithmetic number, because the mean of its divisors is an integer number (35944).

2⁷¹⁸⁸⁷ is an apocalyptic number.

71887 is a deficient number, since it is larger than the sum of its proper divisors (1).

71887 is an equidigital number, since it uses as much as digits as its factorization.

71887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 31.

The square root of 71887 is about 268.1175115504. The cubic root of 71887 is about 41.5799012254.

The spelling of 71887 in words is "seventy-one thousand, eight hundred eighty-seven".