47813 has 4 divisors (see below), whose sum is σ = 48300. Its totient is φ = 47328.

The previous prime is 47809. The next prime is 47819. The reversal of 47813 is 31874.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31874 = 2 ⋅15937.

It can be written as a sum of positive squares in 2 ways, for example, as 31684 + 16129 = 178^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 47813 - 2² = 47809 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38 + ... + 311.

It is an arithmetic number, because the mean of its divisors is an integer number (12075).

2⁴⁷⁸¹³ is an apocalyptic number.

It is an amenable number.

47813 is a deficient number, since it is larger than the sum of its proper divisors (487).

47813 is a wasteful number, since it uses less digits than its factorization.

47813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486.

The product of its digits is 672, while the sum is 23.

The square root of 47813 is about 218.6618393776. The cubic root of 47813 is about 36.2951557763.

The spelling of 47813 in words is "forty-seven thousand, eight hundred thirteen".