1727201321 has 2 divisors, whose sum is σ = 1727201322. Its totient is φ = 1727201320.

The previous prime is 1727201317. The next prime is 1727201323. The reversal of 1727201321 is 1231027271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1555198096 + 172003225 = 39436^2 + 13115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1727201321 - 2² = 1727201317 is a prime.

Together with 1727201323, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (1727201323) 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, 863600660 + 863600661.

It is an arithmetic number, because the mean of its divisors is an integer number (863600661).

Almost surely, 2^1727201321 is an apocalyptic number.

It is an amenable number.

1727201321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1727201321 is an equidigital number, since it uses as much as digits as its factorization.

1727201321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 1727201321 is about 41559.6116560297. The cubic root of 1727201321 is about 1199.8150921109.

Adding to 1727201321 its reverse (1231027271), we get a palindrome (2958228592).

The spelling of 1727201321 in words is "one billion, seven hundred twenty-seven million, two hundred one thousand, three hundred twenty-one".