298607921 has 2 divisors, whose sum is σ = 298607922. Its totient is φ = 298607920.

The previous prime is 298607891. The next prime is 298607957. The reversal of 298607921 is 129706892.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293608225 + 4999696 = 17135^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 298607921 - 2¹⁰ = 298606897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (298607821) 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, 149303960 + 149303961.

It is an arithmetic number, because the mean of its divisors is an integer number (149303961).

Almost surely, 2^298607921 is an apocalyptic number.

It is an amenable number.

298607921 is a deficient number, since it is larger than the sum of its proper divisors (1).

298607921 is an equidigital number, since it uses as much as digits as its factorization.

298607921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 298607921 is about 17280.2754897021. The cubic root of 298607921 is about 668.3958959654.

The spelling of 298607921 in words is "two hundred ninety-eight million, six hundred seven thousand, nine hundred twenty-one".