304689993 has 16 divisors (see below), whose sum is σ = 424379520. Its totient is φ = 194082944.

The previous prime is 304689977. The next prime is 304690003. The reversal of 304689993 is 399986403.

It is a cyclic number.

It is not a de Polignac number, because 304689993 - 2⁴ = 304689977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (304679993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83005 + ... + 86597.

It is an arithmetic number, because the mean of its divisors is an integer number (26523720).

Almost surely, 2^304689993 is an apocalyptic number.

It is an amenable number.

304689993 is a deficient number, since it is larger than the sum of its proper divisors (119689527).

304689993 is a wasteful number, since it uses less digits than its factorization.

304689993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The square root of 304689993 is about 17455.3714655403. The cubic root of 304689993 is about 672.9034117673.

It can be divided in two parts, 3046 and 89993, that added together give a palindrome (93039).

The spelling of 304689993 in words is "three hundred four million, six hundred eighty-nine thousand, nine hundred ninety-three".