30520393 has 2 divisors, whose sum is σ = 30520394. Its totient is φ = 30520392.

The previous prime is 30520387. The next prime is 30520429. The reversal of 30520393 is 39302503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30338064 + 182329 = 5508^2 + 427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30520393 is a prime.

It is not a weakly prime, because it can be changed into another prime (30520493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15260196 + 15260197.

It is an arithmetic number, because the mean of its divisors is an integer number (15260197).

Almost surely, 2^30520393 is an apocalyptic number.

It is an amenable number.

30520393 is a deficient number, since it is larger than the sum of its proper divisors (1).

30520393 is an equidigital number, since it uses as much as digits as its factorization.

30520393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 25.

The square root of 30520393 is about 5524.5264955469. The cubic root of 30520393 is about 312.5096078113.

Adding to 30520393 its reverse (39302503), we get a palindrome (69822896).

The spelling of 30520393 in words is "thirty million, five hundred twenty thousand, three hundred ninety-three".