47731973 has 4 divisors (see below), whose sum is σ = 47754720. Its totient is φ = 47709228.

The previous prime is 47731949. The next prime is 47732011. The reversal of 47731973 is 37913774.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47731973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47731973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47731573) 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, 7865 + ... + 12542.

It is an arithmetic number, because the mean of its divisors is an integer number (11938680).

Almost surely, 2^47731973 is an apocalyptic number.

It is an amenable number.

47731973 is a deficient number, since it is larger than the sum of its proper divisors (22747).

47731973 is a wasteful number, since it uses less digits than its factorization.

47731973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22746.

The product of its digits is 111132, while the sum is 41.

The square root of 47731973 is about 6908.8329694674. The cubic root of 47731973 is about 362.7464147806.

The spelling of 47731973 in words is "forty-seven million, seven hundred thirty-one thousand, nine hundred seventy-three".