69871 has 4 divisors (see below), whose sum is σ = 70632. Its totient is φ = 69112.

The previous prime is 69859. The next prime is 69877. The reversal of 69871 is 17896.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69871 is a prime.

It is a Duffinian number.

69871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220 + ... + 433.

It is an arithmetic number, because the mean of its divisors is an integer number (17658).

2⁶⁹⁸⁷¹ is an apocalyptic number.

69871 is a deficient number, since it is larger than the sum of its proper divisors (761).

69871 is a wasteful number, since it uses less digits than its factorization.

69871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760.

The product of its digits is 3024, while the sum is 31.

The square root of 69871 is about 264.3312316016. The cubic root of 69871 is about 41.1875209638.

The spelling of 69871 in words is "sixty-nine thousand, eight hundred seventy-one".