36689221 has 4 divisors (see below), whose sum is σ = 36702112. Its totient is φ = 36676332.

The previous prime is 36689207. The next prime is 36689227. The reversal of 36689221 is 12298663.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 36689221 - 2⁹ = 36688709 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 (36689227) 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, 81 + ... + 8566.

It is an arithmetic number, because the mean of its divisors is an integer number (9175528).

Almost surely, 2^36689221 is an apocalyptic number.

It is an amenable number.

36689221 is a deficient number, since it is larger than the sum of its proper divisors (12891).

36689221 is an equidigital number, since it uses as much as digits as its factorization.

36689221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12890.

The product of its digits is 31104, while the sum is 37.

The square root of 36689221 is about 6057.1627846707. The cubic root of 36689221 is about 332.2866017216.

The spelling of 36689221 in words is "thirty-six million, six hundred eighty-nine thousand, two hundred twenty-one".