304006397 has 4 divisors (see below), whose sum is σ = 304116540. Its totient is φ = 303896256.

The previous prime is 304006379. The next prime is 304006399. The reversal of 304006397 is 793600403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 793600403 = 31 ⋅25600013.

It can be written as a sum of positive squares in 2 ways, for example, as 82919236 + 221087161 = 9106^2 + 14869^2 .

It is a cyclic number.

It is not a de Polignac number, because 304006397 - 2²⁰ = 302957821 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 (304006399) 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, 50822 + ... + 56487.

It is an arithmetic number, because the mean of its divisors is an integer number (76029135).

Almost surely, 2^304006397 is an apocalyptic number.

It is an amenable number.

304006397 is a deficient number, since it is larger than the sum of its proper divisors (110143).

304006397 is a wasteful number, since it uses less digits than its factorization.

304006397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110142.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 304006397 is about 17435.7792197538. The cubic root of 304006397 is about 672.3997976769.

It can be divided in two parts, 304006 and 397, that added together give a palindrome (304403).

The spelling of 304006397 in words is "three hundred four million, six thousand, three hundred ninety-seven".