36776821 has 4 divisors (see below), whose sum is σ = 36808992. Its totient is φ = 36744652.

The previous prime is 36776783. The next prime is 36776851. The reversal of 36776821 is 12867763.

36776821 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12867763 = 3319 ⋅3877.

It is a cyclic number.

It is not a de Polignac number, because 36776821 - 2²⁵ = 3222389 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36776851) 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, 14305 + ... + 16678.

It is an arithmetic number, because the mean of its divisors is an integer number (9202248).

Almost surely, 2^36776821 is an apocalyptic number.

It is an amenable number.

36776821 is a deficient number, since it is larger than the sum of its proper divisors (32171).

36776821 is a wasteful number, since it uses less digits than its factorization.

36776821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32170.

The product of its digits is 84672, while the sum is 40.

The square root of 36776821 is about 6064.3895818128. The cubic root of 36776821 is about 332.5508498182.

The spelling of 36776821 in words is "thirty-six million, seven hundred seventy-six thousand, eight hundred twenty-one".