306145009 has 3 divisors (see below), whose sum is σ = 306162507. Its totient is φ = 306127512.

The previous prime is 306145001. The next prime is 306145033. The reversal of 306145009 is 900541603.

The square root of 306145009 is 17497.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 305270784 = 935^2 + 17472^2 .

It is not a de Polignac number, because 306145009 - 2³ = 306145001 is a prime.

It is a super-2 number, since 2×306145009² = 187449533071220162, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306145001) 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 2 ways as a sum of consecutive naturals, for example, 8749 + ... + 26245.

It is an arithmetic number, because the mean of its divisors is an integer number (102054169).

Almost surely, 2^306145009 is an apocalyptic number.

306145009 is the 17497-th square number.

306145009 is the 8749-th centered octagonal number.

It is an amenable number.

306145009 is a deficient number, since it is larger than the sum of its proper divisors (17498).

306145009 is an frugal number, since it uses more digits than its factorization.

306145009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34994 (or 17497 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The cubic root of 306145009 is about 673.9728384714.

The spelling of 306145009 in words is "three hundred six million, one hundred forty-five thousand, nine".