298009 has 4 divisors (see below), whose sum is σ = 303120. Its totient is φ = 292900.

The previous prime is 297991. The next prime is 298013. The reversal of 298009 is 900892.

298009 = 40² + 41² + ... + 98².

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 298009 - 2⁷ = 297881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (298049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2467 + ... + 2584.

It is an arithmetic number, because the mean of its divisors is an integer number (75780).

2²⁹⁸⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

298009 is a deficient number, since it is larger than the sum of its proper divisors (5111).

298009 is an equidigital number, since it uses as much as digits as its factorization.

298009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 298009 is about 545.9020058582. The cubic root of 298009 is about 66.7948727345.

The spelling of 298009 in words is "two hundred ninety-eight thousand, nine".