30840389 has 2 divisors, whose sum is σ = 30840390. Its totient is φ = 30840388.

The previous prime is 30840379. The next prime is 30840449. The reversal of 30840389 is 98304803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29789764 + 1050625 = 5458^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 30840389 - 2⁴ = 30840373 is a prime.

It is a super-3 number, since 3×30840389³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30840379) 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, 15420194 + 15420195.

It is an arithmetic number, because the mean of its divisors is an integer number (15420195).

Almost surely, 2^30840389 is an apocalyptic number.

It is an amenable number.

30840389 is a deficient number, since it is larger than the sum of its proper divisors (1).

30840389 is an equidigital number, since it uses as much as digits as its factorization.

30840389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 30840389 is about 5553.4123743875. The cubic root of 30840389 is about 313.5979986781.

The spelling of 30840389 in words is "thirty million, eight hundred forty thousand, three hundred eighty-nine".