10520309 has 2 divisors, whose sum is σ = 10520310. Its totient is φ = 10520308.

The previous prime is 10520291. The next prime is 10520371. The reversal of 10520309 is 90302501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5276209 + 5244100 = 2297^2 + 2290^2 .

It is a cyclic number.

It is not a de Polignac number, because 10520309 - 2²⁰ = 9471733 is a prime.

It is a super-2 number, since 2×10520309² = 221353802910962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10570309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260154 + 5260155.

It is an arithmetic number, because the mean of its divisors is an integer number (5260155).

Almost surely, 2^10520309 is an apocalyptic number.

It is an amenable number.

10520309 is a deficient number, since it is larger than the sum of its proper divisors (1).

10520309 is an equidigital number, since it uses as much as digits as its factorization.

10520309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 10520309 is about 3243.5025820862. The cubic root of 10520309 is about 219.1170464723.

The spelling of 10520309 in words is "ten million, five hundred twenty thousand, three hundred nine".