298969309 has 2 divisors, whose sum is σ = 298969310. Its totient is φ = 298969308.

The previous prime is 298969273. The next prime is 298969331. The reversal of 298969309 is 903969892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265364100 + 33605209 = 16290^2 + 5797^2 .

It is a cyclic number.

It is not a de Polignac number, because 298969309 - 2²¹ = 296872157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 298969309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (298969339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149484654 + 149484655.

It is an arithmetic number, because the mean of its divisors is an integer number (149484655).

Almost surely, 2^298969309 is an apocalyptic number.

It is an amenable number.

298969309 is a deficient number, since it is larger than the sum of its proper divisors (1).

298969309 is an equidigital number, since it uses as much as digits as its factorization.

298969309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The square root of 298969309 is about 17290.7289898373. The cubic root of 298969309 is about 668.6654276375.

The spelling of 298969309 in words is "two hundred ninety-eight million, nine hundred sixty-nine thousand, three hundred nine".