10509839 has 2 divisors, whose sum is σ = 10509840. Its totient is φ = 10509838.

The previous prime is 10509833. The next prime is 10509841. The reversal of 10509839 is 93890501.

It is a strong prime.

It is an emirp because it is prime and its reverse (93890501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10509839 - 2⁴ = 10509823 is a prime.

It is a super-2 number, since 2×10509839² = 220913431611842, which contains 22 as substring.

Together with 10509841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 10509799 and 10509808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10509833) 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, 5254919 + 5254920.

It is an arithmetic number, because the mean of its divisors is an integer number (5254920).

Almost surely, 2^10509839 is an apocalyptic number.

10509839 is a deficient number, since it is larger than the sum of its proper divisors (1).

10509839 is an equidigital number, since it uses as much as digits as its factorization.

10509839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 10509839 is about 3241.8881843765. Note that the first 3 decimals coincide. The cubic root of 10509839 is about 219.0443326081.

The spelling of 10509839 in words is "ten million, five hundred nine thousand, eight hundred thirty-nine".