10209109 has 2 divisors, whose sum is σ = 10209110. Its totient is φ = 10209108.

The previous prime is 10209107. The next prime is 10209119. The reversal of 10209109 is 90190201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6682225 + 3526884 = 2585^2 + 1878^2 .

It is a cyclic number.

It is not a de Polignac number, because 10209109 - 2¹ = 10209107 is a prime.

Together with 10209107, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 10209109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10209107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5104554 + 5104555.

It is an arithmetic number, because the mean of its divisors is an integer number (5104555).

Almost surely, 2^10209109 is an apocalyptic number.

It is an amenable number.

10209109 is a deficient number, since it is larger than the sum of its proper divisors (1).

10209109 is an equidigital number, since it uses as much as digits as its factorization.

10209109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 10209109 is about 3195.1696355593. The cubic root of 10209109 is about 216.9348272078.

The spelling of 10209109 in words is "ten million, two hundred nine thousand, one hundred nine".