27280321 has 2 divisors, whose sum is σ = 27280322. Its totient is φ = 27280320.

The previous prime is 27280307. The next prime is 27280343. The reversal of 27280321 is 12308272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21520321 + 5760000 = 4639^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 27280321 - 2¹³ = 27272129 is a prime.

It is not a weakly prime, because it can be changed into another prime (27280391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13640160 + 13640161.

It is an arithmetic number, because the mean of its divisors is an integer number (13640161).

Almost surely, 2^27280321 is an apocalyptic number.

It is an amenable number.

27280321 is a deficient number, since it is larger than the sum of its proper divisors (1).

27280321 is an equidigital number, since it uses as much as digits as its factorization.

27280321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 27280321 is about 5223.0566721030. The cubic root of 27280321 is about 301.0346534644.

Adding to 27280321 its reverse (12308272), we get a palindrome (39588593).

The spelling of 27280321 in words is "twenty-seven million, two hundred eighty thousand, three hundred twenty-one".