5185703209 has 2 divisors, whose sum is σ = 5185703210. Its totient is φ = 5185703208.

The previous prime is 5185703197. The next prime is 5185703213. The reversal of 5185703209 is 9023075815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5167453225 + 18249984 = 71885^2 + 4272^2 .

It is a cyclic number.

It is not a de Polignac number, because 5185703209 - 2¹¹ = 5185701161 is a prime.

It is not a weakly prime, because it can be changed into another prime (5185703279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2592851604 + 2592851605.

It is an arithmetic number, because the mean of its divisors is an integer number (2592851605).

Almost surely, 2^5185703209 is an apocalyptic number.

It is an amenable number.

5185703209 is a deficient number, since it is larger than the sum of its proper divisors (1).

5185703209 is an equidigital number, since it uses as much as digits as its factorization.

5185703209 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 40.

The square root of 5185703209 is about 72011.8268689248. The cubic root of 5185703209 is about 1730.8890046987.

The spelling of 5185703209 in words is "five billion, one hundred eighty-five million, seven hundred three thousand, two hundred nine".