5117186509 has 2 divisors, whose sum is σ = 5117186510. Its totient is φ = 5117186508.

The previous prime is 5117186471. The next prime is 5117186519. The reversal of 5117186509 is 9056817115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4096384009 + 1020802500 = 64003^2 + 31950^2 .

It is a cyclic number.

It is not a de Polignac number, because 5117186509 - 2¹¹ = 5117184461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5117186519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2558593254 + 2558593255.

It is an arithmetic number, because the mean of its divisors is an integer number (2558593255).

Almost surely, 2^5117186509 is an apocalyptic number.

It is an amenable number.

5117186509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5117186509 is an equidigital number, since it uses as much as digits as its factorization.

5117186509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 43.

The square root of 5117186509 is about 71534.5127123964. The cubic root of 5117186509 is about 1723.2319919614.

The spelling of 5117186509 in words is "five billion, one hundred seventeen million, one hundred eighty-six thousand, five hundred nine".