27947797 has 2 divisors, whose sum is σ = 27947798. Its totient is φ = 27947796.

The previous prime is 27947789. The next prime is 27947809. The reversal of 27947797 is 79774972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25010001 + 2937796 = 5001^2 + 1714^2 .

It is a cyclic number.

It is not a de Polignac number, because 27947797 - 2³ = 27947789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27947707) 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, 13973898 + 13973899.

It is an arithmetic number, because the mean of its divisors is an integer number (13973899).

Almost surely, 2^27947797 is an apocalyptic number.

It is an amenable number.

27947797 is a deficient number, since it is larger than the sum of its proper divisors (1).

27947797 is an equidigital number, since it uses as much as digits as its factorization.

27947797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555848, while the sum is 52.

The square root of 27947797 is about 5286.5676010054. The cubic root of 27947797 is about 303.4700666278.

The spelling of 27947797 in words is "twenty-seven million, nine hundred forty-seven thousand, seven hundred ninety-seven".