30320473 has 4 divisors (see below), whose sum is σ = 30332880. Its totient is φ = 30308068.

The previous prime is 30320471. The next prime is 30320531. The reversal of 30320473 is 37402303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30320473 - 2¹ = 30320471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30320471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183 + ... + 7876.

It is an arithmetic number, because the mean of its divisors is an integer number (7583220).

Almost surely, 2^30320473 is an apocalyptic number.

It is an amenable number.

30320473 is a deficient number, since it is larger than the sum of its proper divisors (12407).

30320473 is an equidigital number, since it uses as much as digits as its factorization.

30320473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12406.

The product of its (nonzero) digits is 1512, while the sum is 22.

The square root of 30320473 is about 5506.4029093411. The cubic root of 30320473 is about 311.8257608378.

Adding to 30320473 its reverse (37402303), we get a palindrome (67722776).

The spelling of 30320473 in words is "thirty million, three hundred twenty thousand, four hundred seventy-three".