36686521 has 2 divisors, whose sum is σ = 36686522. Its totient is φ = 36686520.

The previous prime is 36686509. The next prime is 36686567. The reversal of 36686521 is 12568663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35940025 + 746496 = 5995^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 36686521 - 2¹⁵ = 36653753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36686501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18343260 + 18343261.

It is an arithmetic number, because the mean of its divisors is an integer number (18343261).

Almost surely, 2^36686521 is an apocalyptic number.

It is an amenable number.

36686521 is a deficient number, since it is larger than the sum of its proper divisors (1).

36686521 is an equidigital number, since it uses as much as digits as its factorization.

36686521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 36686521 is about 6056.9399039449. The cubic root of 36686521 is about 332.2784504098.

The spelling of 36686521 in words is "thirty-six million, six hundred eighty-six thousand, five hundred twenty-one".