3447720049 has 4 divisors (see below), whose sum is σ = 3465221364. Its totient is φ = 3430218736.

The previous prime is 3447720019. The next prime is 3447720083. The reversal of 3447720049 is 9400277443.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9400277443 = 151 ⋅62253493.

It can be written as a sum of positive squares in 2 ways, for example, as 2772759649 + 674960400 = 52657^2 + 25980^2 .

It is a cyclic number.

It is not a de Polignac number, because 3447720049 - 2²¹ = 3445622897 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3447719993 and 3447720020.

It is not an unprimeable number, because it can be changed into a prime (3447720019) 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, 8750362 + ... + 8750755.

It is an arithmetic number, because the mean of its divisors is an integer number (866305341).

Almost surely, 2^3447720049 is an apocalyptic number.

It is an amenable number.

3447720049 is a deficient number, since it is larger than the sum of its proper divisors (17501315).

3447720049 is a wasteful number, since it uses less digits than its factorization.

3447720049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17501314.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 3447720049 is about 58717.2891829996. The cubic root of 3447720049 is about 1510.6968771432.

The spelling of 3447720049 in words is "three billion, four hundred forty-seven million, seven hundred twenty thousand, forty-nine".