36205921 has 2 divisors, whose sum is σ = 36205922. Its totient is φ = 36205920.

The previous prime is 36205919. The next prime is 36205931. The reversal of 36205921 is 12950263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35533521 + 672400 = 5961^2 + 820^2 .

It is an emirp because it is prime and its reverse (12950263) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36205921 - 2¹ = 36205919 is a prime.

Together with 36205919, 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 36205921.

It is not a weakly prime, because it can be changed into another prime (36205931) 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, 18102960 + 18102961.

It is an arithmetic number, because the mean of its divisors is an integer number (18102961).

Almost surely, 2^36205921 is an apocalyptic number.

It is an amenable number.

36205921 is a deficient number, since it is larger than the sum of its proper divisors (1).

36205921 is an equidigital number, since it uses as much as digits as its factorization.

36205921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 36205921 is about 6017.1356142271. The cubic root of 36205921 is about 330.8210988221.

The spelling of 36205921 in words is "thirty-six million, two hundred five thousand, nine hundred twenty-one".