304143013 has 4 divisors (see below), whose sum is σ = 320150560. Its totient is φ = 288135468.

The previous prime is 304142977. The next prime is 304143019. The reversal of 304143013 is 310341403.

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, and also an emirpimes, since its reverse is a distinct semiprime: 310341403 = 31 ⋅10011013.

It is a cyclic number.

It is not a de Polignac number, because 304143013 - 2¹³ = 304134821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 16007527 = 304143013 / (3 + 0 + 4 + 1 + 4 + 3 + 0 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304143019) 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, 8003745 + ... + 8003782.

It is an arithmetic number, because the mean of its divisors is an integer number (80037640).

Almost surely, 2^304143013 is an apocalyptic number.

It is an amenable number.

304143013 is a deficient number, since it is larger than the sum of its proper divisors (16007547).

304143013 is a wasteful number, since it uses less digits than its factorization.

304143013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16007546.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 304143013 is about 17439.6964709825. The cubic root of 304143013 is about 672.5005047835.

Adding to 304143013 its reverse (310341403), we get a palindrome (614484416).

The spelling of 304143013 in words is "three hundred four million, one hundred forty-three thousand, thirteen".