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49447 = 197251

49447 has 4 divisors (see below), whose sum is σ = 49896. Its totient is φ = 49000.

The previous prime is 49433. The next prime is 49451. The reversal of 49447 is 74494.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-49447 is a prime.

It is an Ulam number.

It is a Duffinian number.

Its product of digits (4032) is a multiple of the sum of its prime divisors (448).

49447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72 + ... + 322.

It is an arithmetic number, because the mean of its divisors is an integer number (12474).

249447 is an apocalyptic number.

49447 is a deficient number, since it is larger than the sum of its proper divisors (449).

49447 is a wasteful number, since it uses less digits than its factorization.

49447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448.

The product of its digits is 4032, while the sum is 28.

The square root of 49447 is about 222.3668140708. The cubic root of 49447 is about 36.7039932101.

It can be divided in two parts, 49 and 447, that added together give a triangular number (496 = T31).

The spelling of 49447 in words is "forty-nine thousand, four hundred forty-seven".

Divisors: 1 197 251 49447