36820321 has 2 divisors, whose sum is σ = 36820322. Its totient is φ = 36820320.

The previous prime is 36820313. The next prime is 36820339. The reversal of 36820321 is 12302863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36723600 + 96721 = 6060^2 + 311^2 .

It is an emirp because it is prime and its reverse (12302863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36820321 - 2³ = 36820313 is a prime.

It is not a weakly prime, because it can be changed into another prime (36820391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18410160 + 18410161.

It is an arithmetic number, because the mean of its divisors is an integer number (18410161).

Almost surely, 2^36820321 is an apocalyptic number.

It is an amenable number.

36820321 is a deficient number, since it is larger than the sum of its proper divisors (1).

36820321 is an equidigital number, since it uses as much as digits as its factorization.

36820321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 36820321 is about 6067.9750329084. The cubic root of 36820321 is about 332.6819130062.

The spelling of 36820321 in words is "thirty-six million, eight hundred twenty thousand, three hundred twenty-one".