5172805447 has 4 divisors (see below), whose sum is σ = 5174200080. Its totient is φ = 5171410816.

The previous prime is 5172805411. The next prime is 5172805457. The reversal of 5172805447 is 7445082715.

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

It is a cyclic number.

It is not a de Polignac number, because 5172805447 - 2³¹ = 3025321799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5172805457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691738 + ... + 699175.

It is an arithmetic number, because the mean of its divisors is an integer number (1293550020).

Almost surely, 2^5172805447 is an apocalyptic number.

5172805447 is a deficient number, since it is larger than the sum of its proper divisors (1394633).

5172805447 is a wasteful number, since it uses less digits than its factorization.

5172805447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394632.

The product of its (nonzero) digits is 313600, while the sum is 43.

The square root of 5172805447 is about 71922.2180344850. The cubic root of 5172805447 is about 1729.4528042097.

The spelling of 5172805447 in words is "five billion, one hundred seventy-two million, eight hundred five thousand, four hundred forty-seven".