297920387 has 2 divisors, whose sum is σ = 297920388. Its totient is φ = 297920386.

The previous prime is 297920353. The next prime is 297920417. The reversal of 297920387 is 783029792.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 297920387 - 2¹⁴ = 297904003 is a prime.

It is not a weakly prime, because it can be changed into another prime (297920347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148960193 + 148960194.

It is an arithmetic number, because the mean of its divisors is an integer number (148960194).

Almost surely, 2^297920387 is an apocalyptic number.

297920387 is a deficient number, since it is larger than the sum of its proper divisors (1).

297920387 is an equidigital number, since it uses as much as digits as its factorization.

297920387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 297920387 is about 17260.3704189684. The cubic root of 297920387 is about 667.8825159123.

The spelling of 297920387 in words is "two hundred ninety-seven million, nine hundred twenty thousand, three hundred eighty-seven".