10815109 has 2 divisors, whose sum is σ = 10815110. Its totient is φ = 10815108.

The previous prime is 10815107. The next prime is 10815139. The reversal of 10815109 is 90151801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6874884 + 3940225 = 2622^2 + 1985^2 .

It is an emirp because it is prime and its reverse (90151801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10815109 - 2¹ = 10815107 is a prime.

Together with 10815107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10815107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5407554 + 5407555.

It is an arithmetic number, because the mean of its divisors is an integer number (5407555).

Almost surely, 2^10815109 is an apocalyptic number.

It is an amenable number.

10815109 is a deficient number, since it is larger than the sum of its proper divisors (1).

10815109 is an equidigital number, since it uses as much as digits as its factorization.

10815109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 10815109 is about 3288.6333027566. The cubic root of 10815109 is about 221.1449197246.

The spelling of 10815109 in words is "ten million, eight hundred fifteen thousand, one hundred nine".