47656621 has 8 divisors (see below), whose sum is σ = 50111424. Its totient is φ = 45233760.

The previous prime is 47656619. The next prime is 47656639. The reversal of 47656621 is 12665674.

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 47656621 - 2¹ = 47656619 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 (47656681) 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, 4896 + ... + 10921.

It is an arithmetic number, because the mean of its divisors is an integer number (6263928).

Almost surely, 2^47656621 is an apocalyptic number.

It is an amenable number.

47656621 is a deficient number, since it is larger than the sum of its proper divisors (2454803).

47656621 is a wasteful number, since it uses less digits than its factorization.

47656621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15971.

The product of its digits is 60480, while the sum is 37.

The square root of 47656621 is about 6903.3775066992. The cubic root of 47656621 is about 362.5554312380. Note that the first 3 decimals are identical.

The spelling of 47656621 in words is "forty-seven million, six hundred fifty-six thousand, six hundred twenty-one".