47824621 has 8 divisors (see below), whose sum is σ = 54533304. Its totient is φ = 41548800.

The previous prime is 47824619. The next prime is 47824649. The reversal of 47824621 is 12642874.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7502121 + 40322500 = 2739^2 + 6350^2 .

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 47824621 - 2¹ = 47824619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47824321) 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, 107980 + ... + 108421.

It is an arithmetic number, because the mean of its divisors is an integer number (6816663).

Almost surely, 2^47824621 is an apocalyptic number.

It is an amenable number.

47824621 is a deficient number, since it is larger than the sum of its proper divisors (6708683).

47824621 is a wasteful number, since it uses less digits than its factorization.

47824621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216431.

The product of its digits is 21504, while the sum is 34.

The square root of 47824621 is about 6915.5347587876. The cubic root of 47824621 is about 362.9809606338.

The spelling of 47824621 in words is "forty-seven million, eight hundred twenty-four thousand, six hundred twenty-one".