298991 has 12 divisors (see below), whose sum is σ = 376656. Its totient is φ = 232320.

The previous prime is 298943. The next prime is 298993. The reversal of 298991 is 199892.

It is not a de Polignac number, because 298991 - 2¹⁰ = 297967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298993) 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 in 11 ways as a sum of consecutive naturals, for example, 671 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (31388).

2²⁹⁸⁹⁹¹ is an apocalyptic number.

298991 is a deficient number, since it is larger than the sum of its proper divisors (77665).

298991 is a wasteful number, since it uses less digits than its factorization.

298991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 371 counting only the distinct ones).

The product of its digits is 11664, while the sum is 38.

The square root of 298991 is about 546.8006949520. The cubic root of 298991 is about 66.8681598384.

Subtracting from 298991 its reverse (199892), we obtain a palindrome (99099).

The spelling of 298991 in words is "two hundred ninety-eight thousand, nine hundred ninety-one".