5309861 has 2 divisors, whose sum is σ = 5309862. Its totient is φ = 5309860.

The previous prime is 5309851. The next prime is 5309891. The reversal of 5309861 is 1689035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3632836 + 1677025 = 1906^2 + 1295^2 .

It is a cyclic number.

It is not a de Polignac number, because 5309861 - 2¹⁸ = 5047717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5309851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2654930 + 2654931.

It is an arithmetic number, because the mean of its divisors is an integer number (2654931).

Almost surely, 2^5309861 is an apocalyptic number.

It is an amenable number.

5309861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5309861 is an equidigital number, since it uses as much as digits as its factorization.

5309861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 5309861 is about 2304.3135637322. The cubic root of 5309861 is about 174.4594038616.

The spelling of 5309861 in words is "five million, three hundred nine thousand, eight hundred sixty-one".