10281809 has 2 divisors, whose sum is σ = 10281810. Its totient is φ = 10281808.

The previous prime is 10281781. The next prime is 10281811. The reversal of 10281809 is 90818201.

10281809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9168784 + 1113025 = 3028^2 + 1055^2 .

It is an emirp because it is prime and its reverse (90818201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10281809 - 2¹² = 10277713 is a prime.

Together with 10281811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10281829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5140904 + 5140905.

It is an arithmetic number, because the mean of its divisors is an integer number (5140905).

Almost surely, 2^10281809 is an apocalyptic number.

It is an amenable number.

10281809 is a deficient number, since it is larger than the sum of its proper divisors (1).

10281809 is an equidigital number, since it uses as much as digits as its factorization.

10281809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 10281809 is about 3206.5260017658. The cubic root of 10281809 is about 217.4485473041.

The spelling of 10281809 in words is "ten million, two hundred eighty-one thousand, eight hundred nine".