4047388549 has 4 divisors (see below), whose sum is σ = 4047648300. Its totient is φ = 4047128800.

The previous prime is 4047388507. The next prime is 4047388559. The reversal of 4047388549 is 9458837404.

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 2914056324 + 1133332225 = 53982^2 + 33665^2 .

It is a cyclic number.

It is not a de Polignac number, because 4047388549 - 2³¹ = 1899904901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4047388496 and 4047388505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4047388559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104902 + ... + 138199.

It is an arithmetic number, because the mean of its divisors is an integer number (1011912075).

Almost surely, 2^4047388549 is an apocalyptic number.

It is an amenable number.

4047388549 is a deficient number, since it is larger than the sum of its proper divisors (259751).

4047388549 is a wasteful number, since it uses less digits than its factorization.

4047388549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259750.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The square root of 4047388549 is about 63619.0895015010. The cubic root of 4047388549 is about 1593.6451775447.

The spelling of 4047388549 in words is "four billion, forty-seven million, three hundred eighty-eight thousand, five hundred forty-nine".