304050139 has 4 divisors (see below), whose sum is σ = 313858240. Its totient is φ = 294242040.

The previous prime is 304050113. The next prime is 304050143. The reversal of 304050139 is 931050403.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 304050139 - 2⁷ = 304050011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (304050839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4904004 + ... + 4904065.

It is an arithmetic number, because the mean of its divisors is an integer number (78464560).

Almost surely, 2^304050139 is an apocalyptic number.

304050139 is a deficient number, since it is larger than the sum of its proper divisors (9808101).

304050139 is an equidigital number, since it uses as much as digits as its factorization.

304050139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9808100.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 304050139 is about 17437.0335493168. The cubic root of 304050139 is about 672.4320455744.

The spelling of 304050139 in words is "three hundred four million, fifty thousand, one hundred thirty-nine".