306384947 has 6 divisors (see below), whose sum is σ = 336770364. Its totient is φ = 278531660.

The previous prime is 306384943. The next prime is 306384961. The reversal of 306384947 is 749483603.

It is a happy number.

It is not a de Polignac number, because 306384947 - 2² = 306384943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 306384898 and 306384907.

It is not an unprimeable number, because it can be changed into a prime (306384943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1265933 + ... + 1266174.

It is an arithmetic number, because the mean of its divisors is an integer number (56128394).

Almost surely, 2^306384947 is an apocalyptic number.

306384947 is a deficient number, since it is larger than the sum of its proper divisors (30385417).

306384947 is a wasteful number, since it uses less digits than its factorization.

306384947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532129 (or 2532118 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 306384947 is about 17503.8552039258. The cubic root of 306384947 is about 674.1488655848.

The spelling of 306384947 in words is "three hundred six million, three hundred eighty-four thousand, nine hundred forty-seven".