47138873 has 4 divisors (see below), whose sum is σ = 47169780. Its totient is φ = 47107968.

The previous prime is 47138863. The next prime is 47138881. The reversal of 47138873 is 37883174.

47138873 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.

It can be written as a sum of positive squares in 2 ways, for example, as 41126569 + 6012304 = 6413^2 + 2452^2 .

It is a cyclic number.

It is not a de Polignac number, because 47138873 - 2⁴ = 47138857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47138873.

It is not an unprimeable number, because it can be changed into a prime (47138803) 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, 13040 + ... + 16257.

It is an arithmetic number, because the mean of its divisors is an integer number (11792445).

Almost surely, 2^47138873 is an apocalyptic number.

It is an amenable number.

47138873 is a deficient number, since it is larger than the sum of its proper divisors (30907).

47138873 is a wasteful number, since it uses less digits than its factorization.

47138873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30906.

The product of its digits is 112896, while the sum is 41.

The square root of 47138873 is about 6865.7754842407. The cubic root of 47138873 is about 361.2376971661.

The spelling of 47138873 in words is "forty-seven million, one hundred thirty-eight thousand, eight hundred seventy-three".