306664947 has 10 divisors (see below), whose sum is σ = 458104548. Its totient is φ = 204443244.

The previous prime is 306664931. The next prime is 306664961. The reversal of 306664947 is 749466603.

It is not a de Polignac number, because 306664947 - 2⁴ = 306664931 is a prime.

It is a super-3 number, since 3×306664947³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (306664147) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1892913 + ... + 1893074.

Almost surely, 2^306664947 is an apocalyptic number.

306664947 is a deficient number, since it is larger than the sum of its proper divisors (151439601).

306664947 is an equidigital number, since it uses as much as digits as its factorization.

306664947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3785999 (or 3785990 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The square root of 306664947 is about 17511.8516154061. The cubic root of 306664947 is about 674.3541674568.

The spelling of 306664947 in words is "three hundred six million, six hundred sixty-four thousand, nine hundred forty-seven".