30994393 has 2 divisors, whose sum is σ = 30994394. Its totient is φ = 30994392.

The previous prime is 30994391. The next prime is 30994427. The reversal of 30994393 is 39349903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18688329 + 12306064 = 4323^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 30994393 - 2¹ = 30994391 is a prime.

Together with 30994391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30994391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15497196 + 15497197.

It is an arithmetic number, because the mean of its divisors is an integer number (15497197).

Almost surely, 2^30994393 is an apocalyptic number.

It is an amenable number.

30994393 is a deficient number, since it is larger than the sum of its proper divisors (1).

30994393 is an equidigital number, since it uses as much as digits as its factorization.

30994393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 40.

The square root of 30994393 is about 5567.2608165955. The cubic root of 30994393 is about 314.1191246119.

The spelling of 30994393 in words is "thirty million, nine hundred ninety-four thousand, three hundred ninety-three".