298139 has 4 divisors (see below), whose sum is σ = 299256. Its totient is φ = 297024.

The previous prime is 298099. The next prime is 298153. The reversal of 298139 is 931892.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 298139 - 2¹² = 294043 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 298139.

It is not an unprimeable number, because it can be changed into a prime (298159) 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, 107 + ... + 779.

It is an arithmetic number, because the mean of its divisors is an integer number (74814).

2²⁹⁸¹³⁹ is an apocalyptic number.

298139 is a deficient number, since it is larger than the sum of its proper divisors (1117).

298139 is an equidigital number, since it uses as much as digits as its factorization.

298139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

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

The square root of 298139 is about 546.0210618648. The cubic root of 298139 is about 66.8045839301.

The spelling of 298139 in words is "two hundred ninety-eight thousand, one hundred thirty-nine".