47913857 has 4 divisors (see below), whose sum is σ = 47935956. Its totient is φ = 47891760.

The previous prime is 47913847. The next prime is 47913889. The reversal of 47913857 is 75831974.

47913857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75831974 = 2 ⋅37915987.

It can be written as a sum of positive squares in 2 ways, for example, as 37442161 + 10471696 = 6119^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 47913857 - 2⁶ = 47913793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47913847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7394 + ... + 12267.

It is an arithmetic number, because the mean of its divisors is an integer number (11983989).

Almost surely, 2^47913857 is an apocalyptic number.

It is an amenable number.

47913857 is a deficient number, since it is larger than the sum of its proper divisors (22099).

47913857 is a wasteful number, since it uses less digits than its factorization.

47913857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22098.

The product of its digits is 211680, while the sum is 44.

The square root of 47913857 is about 6921.9836029855. The cubic root of 47913857 is about 363.2065825211.

The spelling of 47913857 in words is "forty-seven million, nine hundred thirteen thousand, eight hundred fifty-seven".