47687021 has 8 divisors (see below), whose sum is σ = 49305600. Its totient is φ = 46073520.

The previous prime is 47687009. The next prime is 47687039. The reversal of 47687021 is 12078674.

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 a de Polignac number, because none of the positive numbers 2^k-47687021 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 (47687051) 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, 32420 + ... + 33858.

It is an arithmetic number, because the mean of its divisors is an integer number (6163200).

Almost surely, 2^47687021 is an apocalyptic number.

It is an amenable number.

47687021 is a deficient number, since it is larger than the sum of its proper divisors (1618579).

47687021 is a wasteful number, since it uses less digits than its factorization.

47687021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 47687021 is about 6905.5789764509. The cubic root of 47687021 is about 362.6325058196.

The spelling of 47687021 in words is "forty-seven million, six hundred eighty-seven thousand, twenty-one".