298138679 has 2 divisors, whose sum is σ = 298138680. Its totient is φ = 298138678.

The previous prime is 298138657. The next prime is 298138681. The reversal of 298138679 is 976831892.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-298138679 is a prime.

Together with 298138681, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 298138679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (298138609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149069339 + 149069340.

It is an arithmetic number, because the mean of its divisors is an integer number (149069340).

Almost surely, 2^298138679 is an apocalyptic number.

298138679 is a deficient number, since it is larger than the sum of its proper divisors (1).

298138679 is an equidigital number, since it uses as much as digits as its factorization.

298138679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 53.

The square root of 298138679 is about 17266.6927638155. The cubic root of 298138679 is about 668.0455995441.

The spelling of 298138679 in words is "two hundred ninety-eight million, one hundred thirty-eight thousand, six hundred seventy-nine".