47368781 has 4 divisors (see below), whose sum is σ = 47420700. Its totient is φ = 47316864.

The previous prime is 47368777. The next prime is 47368801. The reversal of 47368781 is 18786374.

47368781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10048900 + 37319881 = 3170^2 + 6109^2 .

It is a cyclic number.

It is not a de Polignac number, because 47368781 - 2² = 47368777 is a prime.

It is a super-2 number, since 2×47368781² = 4487602826851922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47398781) 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 3 ways as a sum of consecutive naturals, for example, 24566 + ... + 26423.

It is an arithmetic number, because the mean of its divisors is an integer number (11855175).

Almost surely, 2^47368781 is an apocalyptic number.

It is an amenable number.

47368781 is a deficient number, since it is larger than the sum of its proper divisors (51919).

47368781 is an equidigital number, since it uses as much as digits as its factorization.

47368781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51918.

The product of its digits is 225792, while the sum is 44.

The square root of 47368781 is about 6882.4981656372. The cubic root of 47368781 is about 361.8240269829.

The spelling of 47368781 in words is "forty-seven million, three hundred sixty-eight thousand, seven hundred eighty-one".