298421309 has 4 divisors (see below), whose sum is σ = 299835840. Its totient is φ = 297006780.

The previous prime is 298421303. The next prime is 298421359. The reversal of 298421309 is 903124892.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 298421309 - 2⁴ = 298421293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298421303) 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, 706949 + ... + 707370.

It is an arithmetic number, because the mean of its divisors is an integer number (74958960).

Almost surely, 2^298421309 is an apocalyptic number.

It is an amenable number.

298421309 is a deficient number, since it is larger than the sum of its proper divisors (1414531).

298421309 is a wasteful number, since it uses less digits than its factorization.

298421309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414530.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 298421309 is about 17274.8750791431. The cubic root of 298421309 is about 668.2566311991.

The spelling of 298421309 in words is "two hundred ninety-eight million, four hundred twenty-one thousand, three hundred nine".