36686921 has 2 divisors, whose sum is σ = 36686922. Its totient is φ = 36686920.

The previous prime is 36686917. The next prime is 36686939. The reversal of 36686921 is 12968663.

36686921 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., 29822521 + 6864400 = 5461^2 + 2620^2 .

It is a cyclic number.

It is not a de Polignac number, because 36686921 - 2² = 36686917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (36686941) 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, 18343460 + 18343461.

It is an arithmetic number, because the mean of its divisors is an integer number (18343461).

Almost surely, 2^36686921 is an apocalyptic number.

It is an amenable number.

36686921 is a deficient number, since it is larger than the sum of its proper divisors (1).

36686921 is an equidigital number, since it uses as much as digits as its factorization.

36686921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 36686921 is about 6056.9729238292. The cubic root of 36686921 is about 332.2796580368.

The spelling of 36686921 in words is "thirty-six million, six hundred eighty-six thousand, nine hundred twenty-one".