47004421 has 4 divisors (see below), whose sum is σ = 47137932. Its totient is φ = 46870912.

The previous prime is 47004413. The next prime is 47004431. The reversal of 47004421 is 12440074.

47004421 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 7452900 + 39551521 = 2730^2 + 6289^2 .

It is a cyclic number.

It is not a de Polignac number, because 47004421 - 2³ = 47004413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47004392 and 47004401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47004431) 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, 66226 + ... + 66931.

It is an arithmetic number, because the mean of its divisors is an integer number (11784483).

Almost surely, 2^47004421 is an apocalyptic number.

It is an amenable number.

47004421 is a deficient number, since it is larger than the sum of its proper divisors (133511).

47004421 is a wasteful number, since it uses less digits than its factorization.

47004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133510.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 47004421 is about 6855.9770273827. The cubic root of 47004421 is about 360.8939229925.

Adding to 47004421 its reverse (12440074), we get a palindrome (59444495).

The spelling of 47004421 in words is "forty-seven million, four thousand, four hundred twenty-one".