36890809 has 4 divisors (see below), whose sum is σ = 37586916. Its totient is φ = 36194704.

The previous prime is 36890807. The next prime is 36890831. The reversal of 36890809 is 90809863.

36890809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90809863 = 2203 ⋅41221.

It can be written as a sum of positive squares in 2 ways, for example, as 15776784 + 21114025 = 3972^2 + 4595^2 .

It is a cyclic number.

It is not a de Polignac number, because 36890809 - 2¹ = 36890807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36890807) 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 in 3 ways as a sum of consecutive naturals, for example, 347974 + ... + 348079.

It is an arithmetic number, because the mean of its divisors is an integer number (9396729).

Almost surely, 2^36890809 is an apocalyptic number.

It is an amenable number.

36890809 is a deficient number, since it is larger than the sum of its proper divisors (696107).

36890809 is an equidigital number, since it uses as much as digits as its factorization.

36890809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696106.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 36890809 is about 6073.7804537207. The cubic root of 36890809 is about 332.8940706213.

The spelling of 36890809 in words is "thirty-six million, eight hundred ninety thousand, eight hundred nine".