47837813 has 4 divisors (see below), whose sum is σ = 50651820. Its totient is φ = 45023808.

The previous prime is 47837773. The next prime is 47837821. The reversal of 47837813 is 31873874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31873874 = 2 ⋅15936937.

It can be written as a sum of positive squares in 2 ways, for example, as 40666129 + 7171684 = 6377^2 + 2678^2 .

It is a cyclic number.

It is not a de Polignac number, because 47837813 - 2⁶ = 47837749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47837843) 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, 1406978 + ... + 1407011.

It is an arithmetic number, because the mean of its divisors is an integer number (12662955).

Almost surely, 2^47837813 is an apocalyptic number.

It is an amenable number.

47837813 is a deficient number, since it is larger than the sum of its proper divisors (2814007).

47837813 is a wasteful number, since it uses less digits than its factorization.

47837813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814006.

The product of its digits is 112896, while the sum is 41.

The square root of 47837813 is about 6916.4884876648. The cubic root of 47837813 is about 363.0143325979.

The spelling of 47837813 in words is "forty-seven million, eight hundred thirty-seven thousand, eight hundred thirteen".