5117813921 has 4 divisors (see below), whose sum is σ = 5583069744. Its totient is φ = 4652558100.

The previous prime is 5117813917. The next prime is 5117813933. The reversal of 5117813921 is 1293187115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5117813921 - 2² = 5117813917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5117810921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232627895 + ... + 232627916.

It is an arithmetic number, because the mean of its divisors is an integer number (1395767436).

Almost surely, 2^5117813921 is an apocalyptic number.

It is an amenable number.

5117813921 is a deficient number, since it is larger than the sum of its proper divisors (465255823).

5117813921 is a wasteful number, since it uses less digits than its factorization.

5117813921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465255822.

The product of its digits is 15120, while the sum is 38.

The square root of 5117813921 is about 71538.8979576845. The cubic root of 5117813921 is about 1723.3024168745.

The spelling of 5117813921 in words is "five billion, one hundred seventeen million, eight hundred thirteen thousand, nine hundred twenty-one".