306681849 has 8 divisors (see below), whose sum is σ = 454343520. Its totient is φ = 204454548.

The previous prime is 306681841. The next prime is 306681857. The reversal of 306681849 is 948186603.

It is an interprime number because it is at equal distance from previous prime (306681841) and next prime (306681857).

It is not a de Polignac number, because 306681849 - 2³ = 306681841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (306681841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5679267 + ... + 5679320.

It is an arithmetic number, because the mean of its divisors is an integer number (56792940).

Almost surely, 2^306681849 is an apocalyptic number.

It is an amenable number.

306681849 is a deficient number, since it is larger than the sum of its proper divisors (147661671).

306681849 is a wasteful number, since it uses less digits than its factorization.

306681849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11358596 (or 11358590 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 306681849 is about 17512.3341962172. The cubic root of 306681849 is about 674.3665563575.

The spelling of 306681849 in words is "three hundred six million, six hundred eighty-one thousand, eight hundred forty-nine".