36438109 has 2 divisors, whose sum is σ = 36438110. Its totient is φ = 36438108.

The previous prime is 36438107. The next prime is 36438119. The reversal of 36438109 is 90183463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35880100 + 558009 = 5990^2 + 747^2 .

It is an emirp because it is prime and its reverse (90183463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36438109 - 2¹ = 36438107 is a prime.

Together with 36438107, 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 (36438107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18219054 + 18219055.

It is an arithmetic number, because the mean of its divisors is an integer number (18219055).

Almost surely, 2^36438109 is an apocalyptic number.

It is an amenable number.

36438109 is a deficient number, since it is larger than the sum of its proper divisors (1).

36438109 is an equidigital number, since it uses as much as digits as its factorization.

36438109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 36438109 is about 6036.3986780199. The cubic root of 36438109 is about 331.5267759615.

The spelling of 36438109 in words is "thirty-six million, four hundred thirty-eight thousand, one hundred nine".