298321987 has 2 divisors, whose sum is σ = 298321988. Its totient is φ = 298321986.

The previous prime is 298321981. The next prime is 298322023. The reversal of 298321987 is 789123892.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 298321987 - 2²³ = 289933379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 298321987.

It is not a weakly prime, because it can be changed into another prime (298321981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149160993 + 149160994.

It is an arithmetic number, because the mean of its divisors is an integer number (149160994).

Almost surely, 2^298321987 is an apocalyptic number.

298321987 is a deficient number, since it is larger than the sum of its proper divisors (1).

298321987 is an equidigital number, since it uses as much as digits as its factorization.

298321987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 298321987 is about 17272.0000868458. Note that the first 4 decimals coincide. The cubic root of 298321987 is about 668.1824855221.

The spelling of 298321987 in words is "two hundred ninety-eight million, three hundred twenty-one thousand, nine hundred eighty-seven".