36647321 has 2 divisors, whose sum is σ = 36647322. Its totient is φ = 36647320.

The previous prime is 36647269. The next prime is 36647323. The reversal of 36647321 is 12374663.

36647321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 1125721 = 5960^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 36647321 - 2¹⁸ = 36385177 is a prime.

It is a super-2 number, since 2×36647321² = 2686052272954082, which contains 22 as substring.

Together with 36647323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36647323) 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 as a sum of consecutive naturals, namely, 18323660 + 18323661.

It is an arithmetic number, because the mean of its divisors is an integer number (18323661).

Almost surely, 2^36647321 is an apocalyptic number.

It is an amenable number.

36647321 is a deficient number, since it is larger than the sum of its proper divisors (1).

36647321 is an equidigital number, since it uses as much as digits as its factorization.

36647321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 32.

The square root of 36647321 is about 6053.7030815857. The cubic root of 36647321 is about 332.1600603591.

The spelling of 36647321 in words is "thirty-six million, six hundred forty-seven thousand, three hundred twenty-one".