27490217 has 2 divisors, whose sum is σ = 27490218. Its totient is φ = 27490216.

The previous prime is 27490193. The next prime is 27490237. The reversal of 27490217 is 71209472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21058921 + 6431296 = 4589^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 27490217 - 2⁶ = 27490153 is a prime.

It is not a weakly prime, because it can be changed into another prime (27490237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13745108 + 13745109.

It is an arithmetic number, because the mean of its divisors is an integer number (13745109).

Almost surely, 2^27490217 is an apocalyptic number.

It is an amenable number.

27490217 is a deficient number, since it is larger than the sum of its proper divisors (1).

27490217 is an equidigital number, since it uses as much as digits as its factorization.

27490217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 27490217 is about 5243.1113854275. Note that the first 3 decimals coincide. The cubic root of 27490217 is about 301.8047397950.

Adding to 27490217 its reverse (71209472), we get a palindrome (98699689).

The spelling of 27490217 in words is "twenty-seven million, four hundred ninety thousand, two hundred seventeen".