30942893 has 2 divisors, whose sum is σ = 30942894. Its totient is φ = 30942892.

The previous prime is 30942883. The next prime is 30942911. The reversal of 30942893 is 39824903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30891364 + 51529 = 5558^2 + 227^2 .

It is an emirp because it is prime and its reverse (39824903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30942893 - 2⁶ = 30942829 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30942803) 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, 15471446 + 15471447.

It is an arithmetic number, because the mean of its divisors is an integer number (15471447).

Almost surely, 2^30942893 is an apocalyptic number.

It is an amenable number.

30942893 is a deficient number, since it is larger than the sum of its proper divisors (1).

30942893 is an equidigital number, since it uses as much as digits as its factorization.

30942893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 30942893 is about 5562.6336388441. The cubic root of 30942893 is about 313.9450490070.

The spelling of 30942893 in words is "thirty million, nine hundred forty-two thousand, eight hundred ninety-three".