297998989 has 2 divisors, whose sum is σ = 297998990. Its totient is φ = 297998988.

The previous prime is 297998963. The next prime is 297999011. The reversal of 297998989 is 989899792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279224100 + 18774889 = 16710^2 + 4333^2 .

It is a cyclic number.

It is not a de Polignac number, because 297998989 - 2¹⁹ = 297474701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (297998689) 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, 148999494 + 148999495.

It is an arithmetic number, because the mean of its divisors is an integer number (148999495).

Almost surely, 2^297998989 is an apocalyptic number.

It is an amenable number.

297998989 is a deficient number, since it is larger than the sum of its proper divisors (1).

297998989 is an equidigital number, since it uses as much as digits as its factorization.

297998989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52907904, while the sum is 70.

The square root of 297998989 is about 17262.6472187785. The cubic root of 297998989 is about 667.9412478059.

The spelling of 297998989 in words is "two hundred ninety-seven million, nine hundred ninety-eight thousand, nine hundred eighty-nine".