47787681 has 8 divisors (see below), whose sum is σ = 63756160. Its totient is φ = 31838832.

The previous prime is 47787667. The next prime is 47787689. The reversal of 47787681 is 18678774.

47787681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 47787681 - 2¹⁰ = 47786657 is a prime.

It is a super-2 number, since 2×47787681² = 4567324910715522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47787681.

It is not an unprimeable number, because it can be changed into a prime (47787689) 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 7 ways as a sum of consecutive naturals, for example, 2280 + ... + 10038.

It is an arithmetic number, because the mean of its divisors is an integer number (7969520).

Almost surely, 2^47787681 is an apocalyptic number.

It is an amenable number.

47787681 is a deficient number, since it is larger than the sum of its proper divisors (15968479).

47787681 is a wasteful number, since it uses less digits than its factorization.

47787681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9815.

The product of its digits is 526848, while the sum is 48.

The square root of 47787681 is about 6912.8634443333. The cubic root of 47787681 is about 362.8874803987.

The spelling of 47787681 in words is "forty-seven million, seven hundred eighty-seven thousand, six hundred eighty-one".