71185047 has 4 divisors (see below), whose sum is σ = 94913400. Its totient is φ = 47456696.

The previous prime is 71185027. The next prime is 71185057. The reversal of 71185047 is 74058117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71185047 - 2⁶ = 71184983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71184999 and 71185017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71185027) 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, 11864172 + ... + 11864177.

It is an arithmetic number, because the mean of its divisors is an integer number (23728350).

Almost surely, 2^71185047 is an apocalyptic number.

71185047 is a deficient number, since it is larger than the sum of its proper divisors (23728353).

71185047 is a wasteful number, since it uses less digits than its factorization.

71185047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23728352.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 71185047 is about 8437.1231471397. The cubic root of 71185047 is about 414.4412027247.

It can be divided in two parts, 711 and 85047, that added together give a palindrome (85758).

The spelling of 71185047 in words is "seventy-one million, one hundred eighty-five thousand, forty-seven".