47427821 has 8 divisors (see below), whose sum is σ = 55668480. Its totient is φ = 39553488.

The previous prime is 47427797. The next prime is 47427889. The reversal of 47427821 is 12872474.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47427821 - 2²² = 43233517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47427521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91301 + ... + 91818.

It is an arithmetic number, because the mean of its divisors is an integer number (6958560).

Almost surely, 2^47427821 is an apocalyptic number.

It is an amenable number.

47427821 is a deficient number, since it is larger than the sum of its proper divisors (8240659).

47427821 is a wasteful number, since it uses less digits than its factorization.

47427821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183163.

The product of its digits is 25088, while the sum is 35.

The square root of 47427821 is about 6886.7859702477. The cubic root of 47427821 is about 361.9742892518.

The spelling of 47427821 in words is "forty-seven million, four hundred twenty-seven thousand, eight hundred twenty-one".