47439 has 16 divisors (see below), whose sum is σ = 80640. Its totient is φ = 27000.

The previous prime is 47431. The next prime is 47441. The reversal of 47439 is 93474.

It is not a de Polignac number, because 47439 - 2³ = 47431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

47439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64 + ... + 314.

It is an arithmetic number, because the mean of its divisors is an integer number (5040).

2⁴⁷⁴³⁹ is an apocalyptic number.

47439 is a deficient number, since it is larger than the sum of its proper divisors (33201).

47439 is a wasteful number, since it uses less digits than its factorization.

47439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 261 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 47439 is about 217.8049586212. The cubic root of 47439 is about 36.2002726799.

The spelling of 47439 in words is "forty-seven thousand, four hundred thirty-nine".