298391 has 4 divisors (see below), whose sum is σ = 301392. Its totient is φ = 295392.

The previous prime is 298373. The next prime is 298399. The reversal of 298391 is 193892.

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

It is a cyclic number.

It is not a de Polignac number, because 298391 - 2⁶ = 298327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 298391.

It is not an unprimeable number, because it can be changed into a prime (298399) 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, 1346 + ... + 1551.

It is an arithmetic number, because the mean of its divisors is an integer number (75348).

2²⁹⁸³⁹¹ is an apocalyptic number.

298391 is a deficient number, since it is larger than the sum of its proper divisors (3001).

298391 is a wasteful number, since it uses less digits than its factorization.

298391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000.

The product of its digits is 3888, while the sum is 32.

The square root of 298391 is about 546.2517734525. The cubic root of 298391 is about 66.8234006724.

The spelling of 298391 in words is "two hundred ninety-eight thousand, three hundred ninety-one".