30712393 has 2 divisors, whose sum is σ = 30712394. Its totient is φ = 30712392.

The previous prime is 30712373. The next prime is 30712397. The reversal of 30712393 is 39321703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21790224 + 8922169 = 4668^2 + 2987^2 .

It is an emirp because it is prime and its reverse (39321703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30712393 - 2⁵ = 30712361 is a prime.

It is not a weakly prime, because it can be changed into another prime (30712397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15356196 + 15356197.

It is an arithmetic number, because the mean of its divisors is an integer number (15356197).

Almost surely, 2^30712393 is an apocalyptic number.

It is an amenable number.

30712393 is a deficient number, since it is larger than the sum of its proper divisors (1).

30712393 is an equidigital number, since it uses as much as digits as its factorization.

30712393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 30712393 is about 5541.8763068116. The cubic root of 30712393 is about 313.1635581194.

The spelling of 30712393 in words is "thirty million, seven hundred twelve thousand, three hundred ninety-three".