297645947 has 2 divisors, whose sum is σ = 297645948. Its totient is φ = 297645946.

The previous prime is 297645913. The next prime is 297645949. The reversal of 297645947 is 749546792.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 297645947 - 2⁶ = 297645883 is a prime.

Together with 297645949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (297645949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148822973 + 148822974.

It is an arithmetic number, because the mean of its divisors is an integer number (148822974).

Almost surely, 2^297645947 is an apocalyptic number.

297645947 is a deficient number, since it is larger than the sum of its proper divisors (1).

297645947 is an equidigital number, since it uses as much as digits as its factorization.

297645947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 53.

The square root of 297645947 is about 17252.4185840710. The cubic root of 297645947 is about 667.6773716333.

The spelling of 297645947 in words is "two hundred ninety-seven million, six hundred forty-five thousand, nine hundred forty-seven".