30806393 has 2 divisors, whose sum is σ = 30806394. Its totient is φ = 30806392.

The previous prime is 30806389. The next prime is 30806411. The reversal of 30806393 is 39360803.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23116864 + 7689529 = 4808^2 + 2773^2 .

It is a cyclic number.

It is not a de Polignac number, because 30806393 - 2² = 30806389 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30805393) 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, 15403196 + 15403197.

It is an arithmetic number, because the mean of its divisors is an integer number (15403197).

Almost surely, 2^30806393 is an apocalyptic number.

It is an amenable number.

30806393 is a deficient number, since it is larger than the sum of its proper divisors (1).

30806393 is an equidigital number, since it uses as much as digits as its factorization.

30806393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 30806393 is about 5550.3507096399. The cubic root of 30806393 is about 313.4827277880.

The spelling of 30806393 in words is "thirty million, eight hundred six thousand, three hundred ninety-three".