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47427 = 315809

47427 has 4 divisors (see below), whose sum is σ = 63240. Its totient is φ = 31616.

The previous prime is 47419. The next prime is 47431. The reversal of 47427 is 72474.

It can be divided in two parts, 47 and 427, that added together give a palindrome (474).

47427 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 47427 - 23 = 47419 is a prime.

It is a D-number.

47427 is a lucky number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 47397 and 47406.

It is not an unprimeable number, because it can be changed into a prime (47407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7902 + ... + 7907.

It is an arithmetic number, because the mean of its divisors is an integer number (15810).

247427 is an apocalyptic number.

47427 is a deficient number, since it is larger than the sum of its proper divisors (15813).

47427 is a wasteful number, since it uses less digits than its factorization.

47427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15812.

The product of its digits is 1568, while the sum is 24.

The square root of 47427 is about 217.7774092967. Note that the first 3 decimals coincide. The cubic root of 47427 is about 36.1972200586.

The spelling of 47427 in words is "forty-seven thousand, four hundred twenty-seven", and thus it is an iban number.

Divisors: 1 3 15809 47427