27440197 has 2 divisors, whose sum is σ = 27440198. Its totient is φ = 27440196.

The previous prime is 27440191. The next prime is 27440207. The reversal of 27440197 is 79104472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19633761 + 7806436 = 4431^2 + 2794^2 .

It is a cyclic number.

It is not a de Polignac number, because 27440197 - 2⁷ = 27440069 is a prime.

It is a super-2 number, since 2×27440197² = 1505928822797618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27440191) 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, 13720098 + 13720099.

It is an arithmetic number, because the mean of its divisors is an integer number (13720099).

Almost surely, 2^27440197 is an apocalyptic number.

It is an amenable number.

27440197 is a deficient number, since it is larger than the sum of its proper divisors (1).

27440197 is an equidigital number, since it uses as much as digits as its factorization.

27440197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 27440197 is about 5238.3391451871. The cubic root of 27440197 is about 301.6215784116.

The spelling of 27440197 in words is "twenty-seven million, four hundred forty thousand, one hundred ninety-seven".