36564421 has 2 divisors, whose sum is σ = 36564422. Its totient is φ = 36564420.

The previous prime is 36564419. The next prime is 36564461. The reversal of 36564421 is 12446563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35640900 + 923521 = 5970^2 + 961^2 .

It is an emirp because it is prime and its reverse (12446563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36564421 - 2¹ = 36564419 is a prime.

Together with 36564419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36564461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18282210 + 18282211.

It is an arithmetic number, because the mean of its divisors is an integer number (18282211).

Almost surely, 2^36564421 is an apocalyptic number.

It is an amenable number.

36564421 is a deficient number, since it is larger than the sum of its proper divisors (1).

36564421 is an equidigital number, since it uses as much as digits as its factorization.

36564421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 36564421 is about 6046.8521562876. The cubic root of 36564421 is about 331.9094112209.

The spelling of 36564421 in words is "thirty-six million, five hundred sixty-four thousand, four hundred twenty-one".