30393481 has 2 divisors, whose sum is σ = 30393482. Its totient is φ = 30393480.

The previous prime is 30393449. The next prime is 30393491. The reversal of 30393481 is 18439303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 319225 = 5484^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 30393481 - 2⁵ = 30393449 is a prime.

It is a super-2 number, since 2×30393481² = 1847527374594722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30393491) 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 as a sum of consecutive naturals, namely, 15196740 + 15196741.

It is an arithmetic number, because the mean of its divisors is an integer number (15196741).

Almost surely, 2^30393481 is an apocalyptic number.

It is an amenable number.

30393481 is a deficient number, since it is larger than the sum of its proper divisors (1).

30393481 is an equidigital number, since it uses as much as digits as its factorization.

30393481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 30393481 is about 5513.0282966805. The cubic root of 30393481 is about 312.0758396888.

The spelling of 30393481 in words is "thirty million, three hundred ninety-three thousand, four hundred eighty-one".