5117204921 has 2 divisors, whose sum is σ = 5117204922. Its totient is φ = 5117204920.

The previous prime is 5117204909. The next prime is 5117204927. The reversal of 5117204921 is 1294027115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3647556025 + 1469648896 = 60395^2 + 38336^2 .

It is a cyclic number.

It is not a de Polignac number, because 5117204921 - 2¹⁸ = 5116942777 is a prime.

It is not a weakly prime, because it can be changed into another prime (5117204927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2558602460 + 2558602461.

It is an arithmetic number, because the mean of its divisors is an integer number (2558602461).

Almost surely, 2^5117204921 is an apocalyptic number.

It is an amenable number.

5117204921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5117204921 is an equidigital number, since it uses as much as digits as its factorization.

5117204921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 5117204921 is about 71534.6414054058. The cubic root of 5117204921 is about 1723.2340587292.

The spelling of 5117204921 in words is "five billion, one hundred seventeen million, two hundred four thousand, nine hundred twenty-one".