71686027 has 4 divisors (see below), whose sum is σ = 81926896. Its totient is φ = 61445160.

The previous prime is 71685989. The next prime is 71686049. The reversal of 71686027 is 72068617.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72068617 = 67 ⋅1075651.

It is not a de Polignac number, because 71686027 - 2¹⁵ = 71653259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71686067) 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, 5120424 + ... + 5120437.

It is an arithmetic number, because the mean of its divisors is an integer number (20481724).

Almost surely, 2^71686027 is an apocalyptic number.

71686027 is a deficient number, since it is larger than the sum of its proper divisors (10240869).

71686027 is a wasteful number, since it uses less digits than its factorization.

71686027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240868.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 71686027 is about 8466.7601241561. The cubic root of 71686027 is about 415.4111703672.

The spelling of 71686027 in words is "seventy-one million, six hundred eighty-six thousand, twenty-seven".