71684 has 6 divisors (see below), whose sum is σ = 125454. Its totient is φ = 35840.

The previous prime is 71671. The next prime is 71693. The reversal of 71684 is 48617.

It can be written as a sum of positive squares in only one way, i.e., 40000 + 31684 = 200^2 + 178^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8957 + ... + 8964.

It is an arithmetic number, because the mean of its divisors is an integer number (20909).

2⁷¹⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

71684 is a deficient number, since it is larger than the sum of its proper divisors (53770).

71684 is a wasteful number, since it uses less digits than its factorization.

71684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17925 (or 17923 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 71684 is about 267.7386785655. The cubic root of 71684 is about 41.5407254930.

The spelling of 71684 in words is "seventy-one thousand, six hundred eighty-four".