47786561 has 4 divisors (see below), whose sum is σ = 48091092. Its totient is φ = 47482032.

The previous prime is 47786537. The next prime is 47786569. The reversal of 47786561 is 16568774.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28558336 + 19228225 = 5344^2 + 4385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47786561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47786569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152030 + ... + 152343.

It is an arithmetic number, because the mean of its divisors is an integer number (12022773).

Almost surely, 2^47786561 is an apocalyptic number.

It is an amenable number.

47786561 is a deficient number, since it is larger than the sum of its proper divisors (304531).

47786561 is a wasteful number, since it uses less digits than its factorization.

47786561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304530.

The product of its digits is 282240, while the sum is 44.

The square root of 47786561 is about 6912.7824354597. The cubic root of 47786561 is about 362.8846453783.

The spelling of 47786561 in words is "forty-seven million, seven hundred eighty-six thousand, five hundred sixty-one".