47681813 has 8 divisors (see below), whose sum is σ = 49483776. Its totient is φ = 45896400.

The previous prime is 47681807. The next prime is 47681827. The reversal of 47681813 is 31818674.

47681813 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 a cyclic number.

It is not a de Polignac number, because 47681813 - 2¹² = 47677717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47681873) 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, 1895 + ... + 9947.

It is an arithmetic number, because the mean of its divisors is an integer number (6185472).

Almost surely, 2^47681813 is an apocalyptic number.

It is an amenable number.

47681813 is a deficient number, since it is larger than the sum of its proper divisors (1801963).

47681813 is a wasteful number, since it uses less digits than its factorization.

47681813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8275.

The product of its digits is 32256, while the sum is 38.

The square root of 47681813 is about 6905.2018797425. The cubic root of 47681813 is about 362.6193040524.

The spelling of 47681813 in words is "forty-seven million, six hundred eighty-one thousand, eight hundred thirteen".