30849391 has 2 divisors, whose sum is σ = 30849392. Its totient is φ = 30849390.

The previous prime is 30849367. The next prime is 30849419. The reversal of 30849391 is 19394803.

It is a weak prime.

It is an emirp because it is prime and its reverse (19394803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30849391 - 2⁹ = 30848879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30849391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30849311) 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, 15424695 + 15424696.

It is an arithmetic number, because the mean of its divisors is an integer number (15424696).

Almost surely, 2^30849391 is an apocalyptic number.

30849391 is a deficient number, since it is larger than the sum of its proper divisors (1).

30849391 is an equidigital number, since it uses as much as digits as its factorization.

30849391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 30849391 is about 5554.2228079183. Note that the first 3 decimals coincide. The cubic root of 30849391 is about 313.6285077459.

The spelling of 30849391 in words is "thirty million, eight hundred forty-nine thousand, three hundred ninety-one".