30009481 has 2 divisors, whose sum is σ = 30009482. Its totient is φ = 30009480.

The previous prime is 30009467. The next prime is 30009517. The reversal of 30009481 is 18490003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29975625 + 33856 = 5475^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 30009481 - 2⁵ = 30009449 is a prime.

It is a super-2 number, since 2×30009481² = 1801137899778722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30009401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15004740 + 15004741.

It is an arithmetic number, because the mean of its divisors is an integer number (15004741).

Almost surely, 2^30009481 is an apocalyptic number.

It is an amenable number.

30009481 is a deficient number, since it is larger than the sum of its proper divisors (1).

30009481 is an equidigital number, since it uses as much as digits as its factorization.

30009481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 30009481 is about 5478.0909996093. The cubic root of 30009481 is about 310.7559801160.

Adding to 30009481 its reverse (18490003), we get a palindrome (48499484).

The spelling of 30009481 in words is "thirty million, nine thousand, four hundred eighty-one".