298387139 has 2 divisors, whose sum is σ = 298387140. Its totient is φ = 298387138.

The previous prime is 298387123. The next prime is 298387151. The reversal of 298387139 is 931783892.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 298387139 - 2⁴ = 298387123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (298387109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149193569 + 149193570.

It is an arithmetic number, because the mean of its divisors is an integer number (149193570).

Almost surely, 2^298387139 is an apocalyptic number.

298387139 is a deficient number, since it is larger than the sum of its proper divisors (1).

298387139 is an equidigital number, since it uses as much as digits as its factorization.

298387139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 298387139 is about 17273.8860422315. The cubic root of 298387139 is about 668.2311245300.

The spelling of 298387139 in words is "two hundred ninety-eight million, three hundred eighty-seven thousand, one hundred thirty-nine".