36121909 has 2 divisors, whose sum is σ = 36121910. Its totient is φ = 36121908.

The previous prime is 36121901. The next prime is 36121949. The reversal of 36121909 is 90912163.

36121909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30217009 + 5904900 = 5497^2 + 2430^2 .

It is a cyclic number.

It is not a de Polignac number, because 36121909 - 2³ = 36121901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36121901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18060954 + 18060955.

It is an arithmetic number, because the mean of its divisors is an integer number (18060955).

Almost surely, 2^36121909 is an apocalyptic number.

It is an amenable number.

36121909 is a deficient number, since it is larger than the sum of its proper divisors (1).

36121909 is an equidigital number, since it uses as much as digits as its factorization.

36121909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 36121909 is about 6010.1504972837. The cubic root of 36121909 is about 330.5650222283.

The spelling of 36121909 in words is "thirty-six million, one hundred twenty-one thousand, nine hundred nine".