47791549 has 4 divisors (see below), whose sum is σ = 51467836. Its totient is φ = 44115264.

The previous prime is 47791547. The next prime is 47791589. The reversal of 47791549 is 94519774.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2229049 + 45562500 = 1493^2 + 6750^2 .

It is a cyclic number.

It is not a de Polignac number, because 47791549 - 2¹ = 47791547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47791499 and 47791508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47791543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1838124 + ... + 1838149.

It is an arithmetic number, because the mean of its divisors is an integer number (12866959).

Almost surely, 2^47791549 is an apocalyptic number.

It is an amenable number.

47791549 is a deficient number, since it is larger than the sum of its proper divisors (3676287).

47791549 is a wasteful number, since it uses less digits than its factorization.

47791549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3676286.

The product of its digits is 317520, while the sum is 46.

The square root of 47791549 is about 6913.1432069645. The cubic root of 47791549 is about 362.8972710035.

It can be divided in two parts, 4779 and 1549, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 47791549 in words is "forty-seven million, seven hundred ninety-one thousand, five hundred forty-nine".