5206309 has 2 divisors, whose sum is σ = 5206310. Its totient is φ = 5206308.

The previous prime is 5206297. The next prime is 5206319. The reversal of 5206309 is 9036025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4601025 + 605284 = 2145^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 5206309 - 2¹⁵ = 5173541 is a prime.

5206309 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5206319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2603154 + 2603155.

It is an arithmetic number, because the mean of its divisors is an integer number (2603155).

Almost surely, 2^5206309 is an apocalyptic number.

It is an amenable number.

5206309 is a deficient number, since it is larger than the sum of its proper divisors (1).

5206309 is an equidigital number, since it uses as much as digits as its factorization.

5206309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 5206309 is about 2281.7337706227. The cubic root of 5206309 is about 173.3178581681.

The spelling of 5206309 in words is "five million, two hundred six thousand, three hundred nine".