36086821 has 4 divisors (see below), whose sum is σ = 37250944. Its totient is φ = 34922700.

The previous prime is 36086789. The next prime is 36086861. The reversal of 36086821 is 12868063.

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.

It is a cyclic number.

It is not a de Polignac number, because 36086821 - 2⁵ = 36086789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36086861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582015 + ... + 582076.

It is an arithmetic number, because the mean of its divisors is an integer number (9312736).

Almost surely, 2^36086821 is an apocalyptic number.

36086821 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

36086821 is a deficient number, since it is larger than the sum of its proper divisors (1164123).

36086821 is a wasteful number, since it uses less digits than its factorization.

36086821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164122.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 36086821 is about 6007.2307263830. The cubic root of 36086821 is about 330.4579531072.

The spelling of 36086821 in words is "thirty-six million, eighty-six thousand, eight hundred twenty-one".