298109989 has 4 divisors (see below), whose sum is σ = 302997100. Its totient is φ = 293222880.

The previous prime is 298109957. The next prime is 298109993. The reversal of 298109989 is 989901892.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43164900 + 254945089 = 6570^2 + 15967^2 .

It is a cyclic number.

It is not a de Polignac number, because 298109989 - 2⁵ = 298109957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298106989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2443464 + ... + 2443585.

It is an arithmetic number, because the mean of its divisors is an integer number (75749275).

Almost surely, 2^298109989 is an apocalyptic number.

It is an amenable number.

298109989 is a deficient number, since it is larger than the sum of its proper divisors (4887111).

298109989 is an equidigital number, since it uses as much as digits as its factorization.

298109989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887110.

The product of its (nonzero) digits is 839808, while the sum is 55.

The square root of 298109989 is about 17265.8619535776. The cubic root of 298109989 is about 668.0241700949.

The spelling of 298109989 in words is "two hundred ninety-eight million, one hundred nine thousand, nine hundred eighty-nine".