27472321 has 2 divisors, whose sum is σ = 27472322. Its totient is φ = 27472320.

The previous prime is 27472307. The next prime is 27472339. The reversal of 27472321 is 12327472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25401600 + 2070721 = 5040^2 + 1439^2 .

It is a cyclic number.

It is not a de Polignac number, because 27472321 - 2¹¹ = 27470273 is a prime.

It is a super-2 number, since 2×27472321² = 1509456842254082, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 27472321.

It is not a weakly prime, because it can be changed into another prime (27472381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13736160 + 13736161.

It is an arithmetic number, because the mean of its divisors is an integer number (13736161).

Almost surely, 2^27472321 is an apocalyptic number.

It is an amenable number.

27472321 is a deficient number, since it is larger than the sum of its proper divisors (1).

27472321 is an equidigital number, since it uses as much as digits as its factorization.

27472321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 28.

The square root of 27472321 is about 5241.4044873488. The cubic root of 27472321 is about 301.7392344302.

Adding to 27472321 its reverse (12327472), we get a palindrome (39799793).

The spelling of 27472321 in words is "twenty-seven million, four hundred seventy-two thousand, three hundred twenty-one".