297478397 has 2 divisors, whose sum is σ = 297478398. Its totient is φ = 297478396.

The previous prime is 297478367. The next prime is 297478403. The reversal of 297478397 is 793874792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201810436 + 95667961 = 14206^2 + 9781^2 .

It is a cyclic number.

It is not a de Polignac number, because 297478397 - 2⁸ = 297478141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (297478367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148739198 + 148739199.

It is an arithmetic number, because the mean of its divisors is an integer number (148739199).

Almost surely, 2^297478397 is an apocalyptic number.

It is an amenable number.

297478397 is a deficient number, since it is larger than the sum of its proper divisors (1).

297478397 is an equidigital number, since it uses as much as digits as its factorization.

297478397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 56.

The square root of 297478397 is about 17247.5620596071. The cubic root of 297478397 is about 667.5520657765.

The spelling of 297478397 in words is "two hundred ninety-seven million, four hundred seventy-eight thousand, three hundred ninety-seven".