36690809 has 2 divisors, whose sum is σ = 36690810. Its totient is φ = 36690808.

The previous prime is 36690781. The next prime is 36690851. The reversal of 36690809 is 90809663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36336784 + 354025 = 6028^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 36690809 - 2⁸ = 36690553 is a prime.

It is not a weakly prime, because it can be changed into another prime (36690889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18345404 + 18345405.

It is an arithmetic number, because the mean of its divisors is an integer number (18345405).

Almost surely, 2^36690809 is an apocalyptic number.

It is an amenable number.

36690809 is a deficient number, since it is larger than the sum of its proper divisors (1).

36690809 is an equidigital number, since it uses as much as digits as its factorization.

36690809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 36690809 is about 6057.2938677267. The cubic root of 36690809 is about 332.2913957137.

The spelling of 36690809 in words is "thirty-six million, six hundred ninety thousand, eight hundred nine".