47857071 has 4 divisors (see below), whose sum is σ = 63809432. Its totient is φ = 31904712.

The previous prime is 47857049. The next prime is 47857081. The reversal of 47857071 is 17075874.

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

It is not a de Polignac number, because 47857071 - 2¹⁰ = 47856047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47857031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7976176 + ... + 7976181.

It is an arithmetic number, because the mean of its divisors is an integer number (15952358).

Almost surely, 2^47857071 is an apocalyptic number.

47857071 is a deficient number, since it is larger than the sum of its proper divisors (15952361).

47857071 is a wasteful number, since it uses less digits than its factorization.

47857071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15952360.

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 47857071 is about 6917.8805280230. The cubic root of 47857071 is about 363.0630387830.

The spelling of 47857071 in words is "forty-seven million, eight hundred fifty-seven thousand, seventy-one".