5172821039 has 4 divisors (see below), whose sum is σ = 5177004024. Its totient is φ = 5168638056.

The previous prime is 5172821011. The next prime is 5172821053. The reversal of 5172821039 is 9301282715.

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 5172821039 - 2¹⁶ = 5172755503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5172820993 and 5172821011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5172821239) 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, 2089637 + ... + 2092110.

It is an arithmetic number, because the mean of its divisors is an integer number (1294251006).

Almost surely, 2^5172821039 is an apocalyptic number.

5172821039 is a deficient number, since it is larger than the sum of its proper divisors (4182985).

5172821039 is a wasteful number, since it uses less digits than its factorization.

5172821039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182984.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 5172821039 is about 71922.3264292806. The cubic root of 5172821039 is about 1729.4545418613.

The spelling of 5172821039 in words is "five billion, one hundred seventy-two million, eight hundred twenty-one thousand, thirty-nine".