304342921 has 4 divisors (see below), whose sum is σ = 304409344. Its totient is φ = 304276500.

The previous prime is 304342919. The next prime is 304342939. The reversal of 304342921 is 129243403.

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 304342921 - 2¹ = 304342919 is a prime.

It is a super-2 number, since 2×304342921² = 185249227125624482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 304342921.

It is not an unprimeable number, because it can be changed into a prime (304342901) 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, 25785 + ... + 35686.

It is an arithmetic number, because the mean of its divisors is an integer number (76102336).

Almost surely, 2^304342921 is an apocalyptic number.

It is an amenable number.

304342921 is a deficient number, since it is larger than the sum of its proper divisors (66423).

304342921 is an equidigital number, since it uses as much as digits as its factorization.

304342921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66422.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 304342921 is about 17445.4269365929. The cubic root of 304342921 is about 672.6478135399.

The spelling of 304342921 in words is "three hundred four million, three hundred forty-two thousand, nine hundred twenty-one".