30306473 has 4 divisors (see below), whose sum is σ = 30432468. Its totient is φ = 30180480.

The previous prime is 30306467. The next prime is 30306511. The reversal of 30306473 is 37460303.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26091664 + 4214809 = 5108^2 + 2053^2 .

It is a cyclic number.

It is not a de Polignac number, because 30306473 - 2¹⁴ = 30290089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30306403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62636 + ... + 63117.

It is an arithmetic number, because the mean of its divisors is an integer number (7608117).

Almost surely, 2^30306473 is an apocalyptic number.

It is an amenable number.

30306473 is a deficient number, since it is larger than the sum of its proper divisors (125995).

30306473 is a wasteful number, since it uses less digits than its factorization.

30306473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125994.

The product of its (nonzero) digits is 4536, while the sum is 26.

The square root of 30306473 is about 5505.1315152319. The cubic root of 30306473 is about 311.7777599075. Note that the first 4 decimals are identical.

Adding to 30306473 its reverse (37460303), we get a palindrome (67766776).

The spelling of 30306473 in words is "thirty million, three hundred six thousand, four hundred seventy-three".