71387 has 2 divisors, whose sum is σ = 71388. Its totient is φ = 71386.

The previous prime is 71363. The next prime is 71389. The reversal of 71387 is 78317.

It is a strong prime.

It is an emirp because it is prime and its reverse (78317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71387 - 2¹⁶ = 5851 is a prime.

It is a super-2 number, since 2×71387² = 10192207538, which contains 22 as substring.

Together with 71389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35693 + 35694.

It is an arithmetic number, because the mean of its divisors is an integer number (35694).

2⁷¹³⁸⁷ is an apocalyptic number.

71387 is a deficient number, since it is larger than the sum of its proper divisors (1).

71387 is an equidigital number, since it uses as much as digits as its factorization.

71387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 26.

The square root of 71387 is about 267.1834575718. The cubic root of 71387 is about 41.4832757889.

The spelling of 71387 in words is "seventy-one thousand, three hundred eighty-seven".