47928247 has 4 divisors (see below), whose sum is σ = 48105376. Its totient is φ = 47751120.

The previous prime is 47928239. The next prime is 47928259. The reversal of 47928247 is 74282974.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74282974 = 2 ⋅37141487.

It is a cyclic number.

It is not a de Polignac number, because 47928247 - 2³ = 47928239 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 (47928227) 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, 88158 + ... + 88699.

It is an arithmetic number, because the mean of its divisors is an integer number (12026344).

Almost surely, 2^47928247 is an apocalyptic number.

47928247 is a deficient number, since it is larger than the sum of its proper divisors (177129).

47928247 is a wasteful number, since it uses less digits than its factorization.

47928247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177128.

The product of its digits is 225792, while the sum is 43.

The square root of 47928247 is about 6923.0229668838. The cubic root of 47928247 is about 363.2429395717.

The spelling of 47928247 in words is "forty-seven million, nine hundred twenty-eight thousand, two hundred forty-seven".